/usr/bin/java -Xmx8000000000 -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/chromosome-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-15 13:25:34,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 13:25:34,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 13:25:34,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 13:25:34,273 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 [2022-02-15 13:25:34,294 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 13:25:34,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 13:25:34,294 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-15 13:25:34,295 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-15 13:25:34,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-15 13:25:34,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-15 13:25:34,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-15 13:25:34,296 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-15 13:25:34,296 INFO L138 SettingsManager]: * Use SBE=true [2022-02-15 13:25:34,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 13:25:34,296 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 13:25:34,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 13:25:34,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 13:25:34,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 13:25:34,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 13:25:34,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 13:25:34,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 13:25:34,297 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 13:25:34,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 13:25:34,297 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 13:25:34,297 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 13:25:34,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 13:25:34,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 13:25:34,297 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 13:25:34,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 13:25:34,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 13:25:34,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 13:25:34,298 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-15 13:25:34,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-15 13:25:34,298 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-15 13:25:34,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-15 13:25:34,298 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-15 13:25:34,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 13:25:34,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-15 13:25:34,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 13:25:34,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 13:25:34,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 13:25:34,472 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-15 13:25:34,473 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-15 13:25:34,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl [2022-02-15 13:25:34,474 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl' [2022-02-15 13:25:34,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 13:25:34,492 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 13:25:34,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-15 13:25:34,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-15 13:25:34,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-15 13:25:34,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:25:34" (1/1) ... [2022-02-15 13:25:34,509 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:25:34" (1/1) ... [2022-02-15 13:25:34,513 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-15 13:25:34,514 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-15 13:25:34,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 13:25:34,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 13:25:34,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 13:25:34,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:25:34" (1/1) ... [2022-02-15 13:25:34,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:25:34" (1/1) ... [2022-02-15 13:25:34,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:25:34" (1/1) ... [2022-02-15 13:25:34,521 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:25:34" (1/1) ... [2022-02-15 13:25:34,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:25:34" (1/1) ... [2022-02-15 13:25:34,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:25:34" (1/1) ... [2022-02-15 13:25:34,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:25:34" (1/1) ... [2022-02-15 13:25:34,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 13:25:34,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 13:25:34,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 13:25:34,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 13:25:34,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:25:34" (1/1) ... [2022-02-15 13:25:34,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 13:25:34,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:25:34,546 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) [2022-02-15 13:25:34,559 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 [2022-02-15 13:25:34,569 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-15 13:25:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-15 13:25:34,570 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-15 13:25:34,570 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-15 13:25:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-15 13:25:34,570 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-15 13:25:34,570 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-15 13:25:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 13:25:34,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 13:25:34,570 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-15 13:25:34,570 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-15 13:25:34,570 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-15 13:25:34,571 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-15 13:25:34,606 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 13:25:34,607 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 13:25:34,701 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 13:25:34,738 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 13:25:34,739 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-15 13:25:34,740 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:25:34 BoogieIcfgContainer [2022-02-15 13:25:34,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 13:25:34,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 13:25:34,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 13:25:34,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 13:25:34,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.02 01:25:34" (1/2) ... [2022-02-15 13:25:34,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd892c1 and model type chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:25:34, skipping insertion in model container [2022-02-15 13:25:34,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:25:34" (2/2) ... [2022-02-15 13:25:34,746 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-subst.wvr.bpl [2022-02-15 13:25:34,749 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-15 13:25:34,749 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-15 13:25:34,749 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 13:25:34,749 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-15 13:25:34,776 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-15 13:25:34,803 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 13:25:34,815 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, mLazyFiniteAutomaton=false, 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 [2022-02-15 13:25:34,815 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-15 13:25:34,821 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2022-02-15 13:25:34,852 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) [2022-02-15 13:25:34,854 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) [2022-02-15 13:25:34,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:25:34,860 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:34,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:34,861 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:34,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:34,865 INFO L85 PathProgramCache]: Analyzing trace with hash 322758138, now seen corresponding path program 1 times [2022-02-15 13:25:34,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:34,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558670123] [2022-02-15 13:25:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:34,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:25:35,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:35,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558670123] [2022-02-15 13:25:35,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558670123] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:25:35,039 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:25:35,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 13:25:35,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895504314] [2022-02-15 13:25:35,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:25:35,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 13:25:35,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:35,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 13:25:35,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-15 13:25:35,068 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) [2022-02-15 13:25:35,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:35,149 INFO L93 Difference]: Finished difference Result 248 states and 694 transitions. [2022-02-15 13:25:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 13:25:35,151 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 [2022-02-15 13:25:35,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:35,161 INFO L225 Difference]: With dead ends: 248 [2022-02-15 13:25:35,161 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 13:25:35,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-15 13:25:35,167 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:35,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:25:35,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 13:25:35,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 129. [2022-02-15 13:25:35,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9609375) internal successors, (379), 128 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 379 transitions. [2022-02-15 13:25:35,245 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 379 transitions. Word has length 17 [2022-02-15 13:25:35,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:35,246 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 379 transitions. [2022-02-15 13:25:35,246 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) [2022-02-15 13:25:35,246 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 379 transitions. [2022-02-15 13:25:35,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:25:35,248 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:35,248 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:35,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 13:25:35,248 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:35,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:35,249 INFO L85 PathProgramCache]: Analyzing trace with hash -515592662, now seen corresponding path program 2 times [2022-02-15 13:25:35,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:35,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774021528] [2022-02-15 13:25:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:35,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:25:35,279 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:35,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774021528] [2022-02-15 13:25:35,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774021528] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:25:35,279 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:25:35,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 13:25:35,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850771193] [2022-02-15 13:25:35,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:25:35,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 13:25:35,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:35,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 13:25:35,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-15 13:25:35,281 INFO L87 Difference]: Start difference. First operand 129 states and 379 transitions. 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) [2022-02-15 13:25:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:35,334 INFO L93 Difference]: Finished difference Result 206 states and 576 transitions. [2022-02-15 13:25:35,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 13:25:35,336 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 [2022-02-15 13:25:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:35,337 INFO L225 Difference]: With dead ends: 206 [2022-02-15 13:25:35,337 INFO L226 Difference]: Without dead ends: 183 [2022-02-15 13:25:35,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-15 13:25:35,338 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:35,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:25:35,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-15 13:25:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2022-02-15 13:25:35,349 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) [2022-02-15 13:25:35,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2022-02-15 13:25:35,350 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2022-02-15 13:25:35,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:35,350 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2022-02-15 13:25:35,350 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) [2022-02-15 13:25:35,350 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2022-02-15 13:25:35,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 13:25:35,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:35,351 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:35,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 13:25:35,352 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:35,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:35,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1307213656, now seen corresponding path program 3 times [2022-02-15 13:25:35,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:35,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733604105] [2022-02-15 13:25:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:35,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:35,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:25:35,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:35,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733604105] [2022-02-15 13:25:35,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733604105] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:25:35,383 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:25:35,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 13:25:35,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146023071] [2022-02-15 13:25:35,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:25:35,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 13:25:35,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:35,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 13:25:35,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 13:25:35,385 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. 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) [2022-02-15 13:25:35,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:35,442 INFO L93 Difference]: Finished difference Result 141 states and 406 transitions. [2022-02-15 13:25:35,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 13:25:35,443 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 [2022-02-15 13:25:35,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:35,445 INFO L225 Difference]: With dead ends: 141 [2022-02-15 13:25:35,445 INFO L226 Difference]: Without dead ends: 141 [2022-02-15 13:25:35,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:25:35,454 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:35,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:25:35,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-02-15 13:25:35,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2022-02-15 13:25:35,463 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) [2022-02-15 13:25:35,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2022-02-15 13:25:35,464 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2022-02-15 13:25:35,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:35,464 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2022-02-15 13:25:35,464 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) [2022-02-15 13:25:35,464 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2022-02-15 13:25:35,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:25:35,465 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:35,465 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:35,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 13:25:35,466 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:35,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:35,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1230707719, now seen corresponding path program 1 times [2022-02-15 13:25:35,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:35,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920442312] [2022-02-15 13:25:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:35,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:25:35,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:35,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920442312] [2022-02-15 13:25:35,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920442312] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:25:35,529 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:25:35,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 13:25:35,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447337567] [2022-02-15 13:25:35,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:25:35,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:25:35,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:35,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:25:35,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:25:35,531 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2022-02-15 13:25:35,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:35,584 INFO L93 Difference]: Finished difference Result 265 states and 764 transitions. [2022-02-15 13:25:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 13:25:35,584 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 [2022-02-15 13:25:35,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:35,586 INFO L225 Difference]: With dead ends: 265 [2022-02-15 13:25:35,586 INFO L226 Difference]: Without dead ends: 238 [2022-02-15 13:25:35,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:25:35,587 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:35,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 22 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:25:35,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-02-15 13:25:35,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 178. [2022-02-15 13:25:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:35,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2022-02-15 13:25:35,596 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 18 [2022-02-15 13:25:35,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:35,597 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2022-02-15 13:25:35,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2022-02-15 13:25:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2022-02-15 13:25:35,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:25:35,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:35,598 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:35,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 13:25:35,599 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:35,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:35,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1661741005, now seen corresponding path program 2 times [2022-02-15 13:25:35,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:35,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987601035] [2022-02-15 13:25:35,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:35,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:35,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:25:35,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:35,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987601035] [2022-02-15 13:25:35,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987601035] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:25:35,695 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:25:35,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 13:25:35,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917289351] [2022-02-15 13:25:35,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:25:35,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:25:35,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:35,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:25:35,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:25:35,698 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2022-02-15 13:25:35,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:35,824 INFO L93 Difference]: Finished difference Result 372 states and 1056 transitions. [2022-02-15 13:25:35,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:25:35,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 [2022-02-15 13:25:35,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:35,827 INFO L225 Difference]: With dead ends: 372 [2022-02-15 13:25:35,828 INFO L226 Difference]: Without dead ends: 345 [2022-02-15 13:25:35,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:25:35,832 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:35,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 38 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:25:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-02-15 13:25:35,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 195. [2022-02-15 13:25:35,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0412371134020617) internal successors, (590), 194 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:35,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 590 transitions. [2022-02-15 13:25:35,851 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 590 transitions. Word has length 18 [2022-02-15 13:25:35,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:35,851 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 590 transitions. [2022-02-15 13:25:35,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2022-02-15 13:25:35,851 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 590 transitions. [2022-02-15 13:25:35,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:25:35,855 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:35,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:35,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 13:25:35,856 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:35,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:35,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1646280209, now seen corresponding path program 3 times [2022-02-15 13:25:35,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:35,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965538265] [2022-02-15 13:25:35,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:35,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:25:35,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:35,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965538265] [2022-02-15 13:25:35,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965538265] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:25:35,955 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:25:35,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 13:25:35,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730033369] [2022-02-15 13:25:35,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:25:35,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:25:35,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:35,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:25:35,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:25:35,956 INFO L87 Difference]: Start difference. First operand 195 states and 590 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2022-02-15 13:25:36,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:36,080 INFO L93 Difference]: Finished difference Result 372 states and 1031 transitions. [2022-02-15 13:25:36,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:25:36,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 [2022-02-15 13:25:36,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:36,085 INFO L225 Difference]: With dead ends: 372 [2022-02-15 13:25:36,085 INFO L226 Difference]: Without dead ends: 332 [2022-02-15 13:25:36,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:25:36,087 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:36,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:25:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-15 13:25:36,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 195. [2022-02-15 13:25:36,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0103092783505154) internal successors, (584), 194 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 584 transitions. [2022-02-15 13:25:36,094 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 584 transitions. Word has length 18 [2022-02-15 13:25:36,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:36,094 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 584 transitions. [2022-02-15 13:25:36,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2022-02-15 13:25:36,094 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 584 transitions. [2022-02-15 13:25:36,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 13:25:36,095 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:36,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:36,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 13:25:36,095 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:36,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:36,097 INFO L85 PathProgramCache]: Analyzing trace with hash 414579593, now seen corresponding path program 4 times [2022-02-15 13:25:36,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:36,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889170432] [2022-02-15 13:25:36,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:36,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:36,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:25:36,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:36,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889170432] [2022-02-15 13:25:36,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889170432] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:25:36,190 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:25:36,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 13:25:36,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264394600] [2022-02-15 13:25:36,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:25:36,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 13:25:36,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:36,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 13:25:36,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:25:36,191 INFO L87 Difference]: Start difference. First operand 195 states and 584 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2022-02-15 13:25:36,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:36,263 INFO L93 Difference]: Finished difference Result 318 states and 896 transitions. [2022-02-15 13:25:36,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:25:36,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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 [2022-02-15 13:25:36,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:36,265 INFO L225 Difference]: With dead ends: 318 [2022-02-15 13:25:36,265 INFO L226 Difference]: Without dead ends: 255 [2022-02-15 13:25:36,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:25:36,266 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:36,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 31 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:25:36,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-15 13:25:36,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 195. [2022-02-15 13:25:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9536082474226806) internal successors, (573), 194 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 573 transitions. [2022-02-15 13:25:36,276 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 573 transitions. Word has length 18 [2022-02-15 13:25:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:36,276 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 573 transitions. [2022-02-15 13:25:36,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 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) [2022-02-15 13:25:36,276 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 573 transitions. [2022-02-15 13:25:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:25:36,277 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:36,277 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:36,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 13:25:36,277 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:36,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:36,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1321939015, now seen corresponding path program 1 times [2022-02-15 13:25:36,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:36,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570531717] [2022-02-15 13:25:36,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:36,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:25:36,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:36,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570531717] [2022-02-15 13:25:36,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570531717] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:25:36,329 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:25:36,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:25:36,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864689647] [2022-02-15 13:25:36,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:25:36,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:25:36,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:36,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:25:36,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:25:36,331 INFO L87 Difference]: Start difference. First operand 195 states and 573 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:36,374 INFO L93 Difference]: Finished difference Result 285 states and 816 transitions. [2022-02-15 13:25:36,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:25:36,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:25:36,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:36,376 INFO L225 Difference]: With dead ends: 285 [2022-02-15 13:25:36,376 INFO L226 Difference]: Without dead ends: 261 [2022-02-15 13:25:36,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:25:36,377 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:36,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 36 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:25:36,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-02-15 13:25:36,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 183. [2022-02-15 13:25:36,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2022-02-15 13:25:36,382 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2022-02-15 13:25:36,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:36,382 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2022-02-15 13:25:36,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,382 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2022-02-15 13:25:36,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:25:36,383 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:36,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:36,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 13:25:36,383 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:36,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:36,384 INFO L85 PathProgramCache]: Analyzing trace with hash 170737749, now seen corresponding path program 1 times [2022-02-15 13:25:36,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:36,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111163884] [2022-02-15 13:25:36,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:36,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:25:36,410 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:36,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111163884] [2022-02-15 13:25:36,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111163884] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:25:36,410 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:25:36,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:25:36,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072664308] [2022-02-15 13:25:36,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:25:36,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:25:36,411 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:36,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:25:36,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:25:36,412 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:36,458 INFO L93 Difference]: Finished difference Result 279 states and 816 transitions. [2022-02-15 13:25:36,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:25:36,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:25:36,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:36,460 INFO L225 Difference]: With dead ends: 279 [2022-02-15 13:25:36,460 INFO L226 Difference]: Without dead ends: 279 [2022-02-15 13:25:36,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:25:36,460 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:36,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 33 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:25:36,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-02-15 13:25:36,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 183. [2022-02-15 13:25:36,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2022-02-15 13:25:36,465 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2022-02-15 13:25:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:36,465 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2022-02-15 13:25:36,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,466 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2022-02-15 13:25:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:25:36,466 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:36,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:36,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 13:25:36,466 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:36,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:36,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1862125575, now seen corresponding path program 2 times [2022-02-15 13:25:36,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:36,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414524229] [2022-02-15 13:25:36,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:36,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:25:36,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:36,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414524229] [2022-02-15 13:25:36,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414524229] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:25:36,496 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:25:36,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:25:36,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678507370] [2022-02-15 13:25:36,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:25:36,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:25:36,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:36,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:25:36,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:25:36,497 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:36,549 INFO L93 Difference]: Finished difference Result 333 states and 939 transitions. [2022-02-15 13:25:36,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:25:36,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:25:36,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:36,550 INFO L225 Difference]: With dead ends: 333 [2022-02-15 13:25:36,550 INFO L226 Difference]: Without dead ends: 321 [2022-02-15 13:25:36,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:25:36,551 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:36,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 30 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:25:36,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-02-15 13:25:36,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 201. [2022-02-15 13:25:36,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.955) internal successors, (591), 200 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 591 transitions. [2022-02-15 13:25:36,557 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 591 transitions. Word has length 19 [2022-02-15 13:25:36,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:36,557 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 591 transitions. [2022-02-15 13:25:36,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,557 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 591 transitions. [2022-02-15 13:25:36,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:25:36,558 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:36,558 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:36,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 13:25:36,558 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:36,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:36,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1006568847, now seen corresponding path program 2 times [2022-02-15 13:25:36,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:36,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863671088] [2022-02-15 13:25:36,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:36,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:25:36,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:36,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863671088] [2022-02-15 13:25:36,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863671088] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:25:36,589 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:25:36,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:25:36,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983732962] [2022-02-15 13:25:36,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:25:36,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:25:36,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:36,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:25:36,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:25:36,590 INFO L87 Difference]: Start difference. First operand 201 states and 591 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:36,650 INFO L93 Difference]: Finished difference Result 297 states and 852 transitions. [2022-02-15 13:25:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:25:36,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:25:36,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:36,651 INFO L225 Difference]: With dead ends: 297 [2022-02-15 13:25:36,651 INFO L226 Difference]: Without dead ends: 297 [2022-02-15 13:25:36,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:25:36,652 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:36,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 30 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:25:36,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-02-15 13:25:36,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 201. [2022-02-15 13:25:36,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.955) internal successors, (591), 200 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 591 transitions. [2022-02-15 13:25:36,657 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 591 transitions. Word has length 19 [2022-02-15 13:25:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:36,657 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 591 transitions. [2022-02-15 13:25:36,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,658 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 591 transitions. [2022-02-15 13:25:36,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:25:36,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:36,658 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:36,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 13:25:36,658 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:36,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:36,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1593484449, now seen corresponding path program 3 times [2022-02-15 13:25:36,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:36,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976419633] [2022-02-15 13:25:36,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:36,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:36,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:25:36,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:36,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976419633] [2022-02-15 13:25:36,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976419633] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:25:36,684 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:25:36,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:25:36,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316671049] [2022-02-15 13:25:36,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:25:36,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:25:36,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:36,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:25:36,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:25:36,685 INFO L87 Difference]: Start difference. First operand 201 states and 591 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:36,723 INFO L93 Difference]: Finished difference Result 219 states and 632 transitions. [2022-02-15 13:25:36,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:25:36,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:25:36,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:36,724 INFO L225 Difference]: With dead ends: 219 [2022-02-15 13:25:36,724 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 13:25:36,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:25:36,725 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:36,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 21 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:25:36,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 13:25:36,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 188. [2022-02-15 13:25:36,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9572192513368982) internal successors, (553), 187 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 553 transitions. [2022-02-15 13:25:36,729 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 553 transitions. Word has length 19 [2022-02-15 13:25:36,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:36,729 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 553 transitions. [2022-02-15 13:25:36,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,729 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 553 transitions. [2022-02-15 13:25:36,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:25:36,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:36,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:36,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 13:25:36,730 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:36,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:36,730 INFO L85 PathProgramCache]: Analyzing trace with hash -353547893, now seen corresponding path program 3 times [2022-02-15 13:25:36,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:36,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134343139] [2022-02-15 13:25:36,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:36,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:36,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:36,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 13:25:36,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:36,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134343139] [2022-02-15 13:25:36,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134343139] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:25:36,761 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:25:36,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:25:36,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817159265] [2022-02-15 13:25:36,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:25:36,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:25:36,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:36,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:25:36,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:25:36,762 INFO L87 Difference]: Start difference. First operand 188 states and 553 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:36,808 INFO L93 Difference]: Finished difference Result 267 states and 774 transitions. [2022-02-15 13:25:36,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:25:36,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:25:36,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:36,809 INFO L225 Difference]: With dead ends: 267 [2022-02-15 13:25:36,809 INFO L226 Difference]: Without dead ends: 267 [2022-02-15 13:25:36,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:25:36,810 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:36,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 29 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:25:36,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-02-15 13:25:36,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 189. [2022-02-15 13:25:36,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-02-15 13:25:36,814 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2022-02-15 13:25:36,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:36,814 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-02-15 13:25:36,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-02-15 13:25:36,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:25:36,815 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:36,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:36,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 13:25:36,815 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:36,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:36,816 INFO L85 PathProgramCache]: Analyzing trace with hash 844809037, now seen corresponding path program 4 times [2022-02-15 13:25:36,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:36,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810875214] [2022-02-15 13:25:36,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:36,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:36,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:25:36,845 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:36,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810875214] [2022-02-15 13:25:36,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810875214] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:25:36,846 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:25:36,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:25:36,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150081747] [2022-02-15 13:25:36,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:25:36,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:25:36,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:36,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:25:36,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:25:36,847 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:36,901 INFO L93 Difference]: Finished difference Result 207 states and 591 transitions. [2022-02-15 13:25:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:25:36,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:25:36,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:36,902 INFO L225 Difference]: With dead ends: 207 [2022-02-15 13:25:36,903 INFO L226 Difference]: Without dead ends: 195 [2022-02-15 13:25:36,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 13:25:36,903 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:36,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 29 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:25:36,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-02-15 13:25:36,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-02-15 13:25:36,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.922680412371134) internal successors, (567), 194 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 567 transitions. [2022-02-15 13:25:36,908 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 567 transitions. Word has length 19 [2022-02-15 13:25:36,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:36,908 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 567 transitions. [2022-02-15 13:25:36,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,908 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 567 transitions. [2022-02-15 13:25:36,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:25:36,909 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:36,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:36,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 13:25:36,909 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:36,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:36,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1370864431, now seen corresponding path program 5 times [2022-02-15 13:25:36,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:36,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662016479] [2022-02-15 13:25:36,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:36,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:25:36,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:36,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662016479] [2022-02-15 13:25:36,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662016479] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:25:36,942 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:25:36,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:25:36,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444867889] [2022-02-15 13:25:36,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:25:36,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:25:36,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:36,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:25:36,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:25:36,943 INFO L87 Difference]: Start difference. First operand 195 states and 567 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:36,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:36,997 INFO L93 Difference]: Finished difference Result 214 states and 623 transitions. [2022-02-15 13:25:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:25:36,997 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:25:36,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:36,998 INFO L225 Difference]: With dead ends: 214 [2022-02-15 13:25:36,998 INFO L226 Difference]: Without dead ends: 214 [2022-02-15 13:25:36,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:25:36,999 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:36,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:25:37,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-15 13:25:37,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2022-02-15 13:25:37,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:37,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-02-15 13:25:37,003 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2022-02-15 13:25:37,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:37,003 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-02-15 13:25:37,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:37,004 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-02-15 13:25:37,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 13:25:37,004 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:37,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:37,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 13:25:37,004 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:37,004 INFO L85 PathProgramCache]: Analyzing trace with hash -297779051, now seen corresponding path program 6 times [2022-02-15 13:25:37,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:37,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464497792] [2022-02-15 13:25:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:37,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:37,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:25:37,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:37,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464497792] [2022-02-15 13:25:37,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464497792] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 13:25:37,031 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 13:25:37,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 13:25:37,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147630869] [2022-02-15 13:25:37,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 13:25:37,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 13:25:37,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:37,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 13:25:37,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 13:25:37,032 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:37,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:37,081 INFO L93 Difference]: Finished difference Result 208 states and 605 transitions. [2022-02-15 13:25:37,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 13:25:37,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have 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 [2022-02-15 13:25:37,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:37,082 INFO L225 Difference]: With dead ends: 208 [2022-02-15 13:25:37,082 INFO L226 Difference]: Without dead ends: 208 [2022-02-15 13:25:37,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 13:25:37,083 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:37,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 33 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 13:25:37,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-15 13:25:37,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 189. [2022-02-15 13:25:37,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:37,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-02-15 13:25:37,087 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2022-02-15 13:25:37,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:37,087 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-02-15 13:25:37,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:37,087 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-02-15 13:25:37,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 13:25:37,088 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:37,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:37,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 13:25:37,088 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:37,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:37,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1817075563, now seen corresponding path program 1 times [2022-02-15 13:25:37,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:37,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563340150] [2022-02-15 13:25:37,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:37,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:25:37,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:37,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563340150] [2022-02-15 13:25:37,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563340150] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:25:37,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319141409] [2022-02-15 13:25:37,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:37,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:37,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:25:37,136 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) [2022-02-15 13:25:37,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-15 13:25:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:37,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-15 13:25:37,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:25:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:25:37,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:25:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:25:37,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319141409] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:25:37,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:25:37,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-02-15 13:25:37,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799880583] [2022-02-15 13:25:37,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:25:37,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 13:25:37,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:37,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 13:25:37,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-02-15 13:25:37,483 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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) [2022-02-15 13:25:37,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:37,639 INFO L93 Difference]: Finished difference Result 561 states and 1635 transitions. [2022-02-15 13:25:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 13:25:37,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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 [2022-02-15 13:25:37,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:37,641 INFO L225 Difference]: With dead ends: 561 [2022-02-15 13:25:37,641 INFO L226 Difference]: Without dead ends: 282 [2022-02-15 13:25:37,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2022-02-15 13:25:37,642 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:37,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 44 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:25:37,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-02-15 13:25:37,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2022-02-15 13:25:37,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.9359430604982206) internal successors, (825), 281 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:37,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 825 transitions. [2022-02-15 13:25:37,658 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 825 transitions. Word has length 20 [2022-02-15 13:25:37,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:37,658 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 825 transitions. [2022-02-15 13:25:37,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 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) [2022-02-15 13:25:37,659 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 825 transitions. [2022-02-15 13:25:37,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 13:25:37,659 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:37,659 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:37,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-15 13:25:37,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-02-15 13:25:37,876 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:37,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:37,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1806041876, now seen corresponding path program 2 times [2022-02-15 13:25:37,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:37,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113624175] [2022-02-15 13:25:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:37,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:25:37,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:37,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113624175] [2022-02-15 13:25:37,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113624175] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:25:37,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976394326] [2022-02-15 13:25:37,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:25:37,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:37,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:25:37,946 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) [2022-02-15 13:25:37,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-15 13:25:37,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:25:37,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:25:37,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-15 13:25:37,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:25:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:25:38,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:25:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:25:38,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976394326] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:25:38,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:25:38,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-02-15 13:25:38,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242694399] [2022-02-15 13:25:38,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:25:38,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 13:25:38,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:38,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 13:25:38,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-02-15 13:25:38,190 INFO L87 Difference]: Start difference. First operand 282 states and 825 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-02-15 13:25:38,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:38,355 INFO L93 Difference]: Finished difference Result 406 states and 1187 transitions. [2022-02-15 13:25:38,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 13:25:38,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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 23 [2022-02-15 13:25:38,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:38,357 INFO L225 Difference]: With dead ends: 406 [2022-02-15 13:25:38,358 INFO L226 Difference]: Without dead ends: 313 [2022-02-15 13:25:38,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-02-15 13:25:38,358 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:38,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 52 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 13:25:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-02-15 13:25:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2022-02-15 13:25:38,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.9391025641025643) internal successors, (917), 312 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) [2022-02-15 13:25:38,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 917 transitions. [2022-02-15 13:25:38,364 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 917 transitions. Word has length 23 [2022-02-15 13:25:38,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:38,364 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 917 transitions. [2022-02-15 13:25:38,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 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) [2022-02-15 13:25:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 917 transitions. [2022-02-15 13:25:38,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:25:38,365 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:38,365 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:38,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-15 13:25:38,581 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,SelfDestructingSolverStorable17 [2022-02-15 13:25:38,582 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:38,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:38,582 INFO L85 PathProgramCache]: Analyzing trace with hash 140853163, now seen corresponding path program 3 times [2022-02-15 13:25:38,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:38,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354057428] [2022-02-15 13:25:38,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:38,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:25:38,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:38,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354057428] [2022-02-15 13:25:38,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354057428] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:25:38,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424326545] [2022-02-15 13:25:38,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:25:38,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:38,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:25:38,792 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) [2022-02-15 13:25:38,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-15 13:25:38,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:25:38,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:25:38,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:25:38,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:25:38,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:25:38,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:25:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:25:39,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:25:39,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:25:39,451 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 50 treesize of output 47 [2022-02-15 13:25:39,504 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:25:39,505 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 28 treesize of output 25 [2022-02-15 13:25:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:25:39,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424326545] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:25:39,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:25:39,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-15 13:25:39,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134953539] [2022-02-15 13:25:39,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:25:39,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:25:39,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:39,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:25:39,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:25:39,510 INFO L87 Difference]: Start difference. First operand 313 states and 917 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) [2022-02-15 13:25:40,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:40,156 INFO L93 Difference]: Finished difference Result 548 states and 1593 transitions. [2022-02-15 13:25:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:25:40,156 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 24 [2022-02-15 13:25:40,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:40,158 INFO L225 Difference]: With dead ends: 548 [2022-02-15 13:25:40,158 INFO L226 Difference]: Without dead ends: 475 [2022-02-15 13:25:40,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:25:40,159 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 161 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:40,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 220 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:25:40,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-02-15 13:25:40,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 341. [2022-02-15 13:25:40,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.9647058823529413) internal successors, (1008), 340 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) [2022-02-15 13:25:40,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1008 transitions. [2022-02-15 13:25:40,166 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1008 transitions. Word has length 24 [2022-02-15 13:25:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:40,166 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 1008 transitions. [2022-02-15 13:25:40,166 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) [2022-02-15 13:25:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1008 transitions. [2022-02-15 13:25:40,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:25:40,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:40,167 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:40,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-15 13:25:40,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:40,398 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:40,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:40,399 INFO L85 PathProgramCache]: Analyzing trace with hash 281813425, now seen corresponding path program 4 times [2022-02-15 13:25:40,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:40,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728870787] [2022-02-15 13:25:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:40,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:25:40,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:40,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728870787] [2022-02-15 13:25:40,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728870787] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:25:40,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219429730] [2022-02-15 13:25:40,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:25:40,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:40,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:25:40,577 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) [2022-02-15 13:25:40,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-15 13:25:40,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:25:40,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:25:40,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:25:40,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:25:40,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:25:40,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:25:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:25:40,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:25:41,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:25:41,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 101 [2022-02-15 13:25:41,646 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:25:41,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-15 13:25:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:25:41,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219429730] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:25:41,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:25:41,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:25:41,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536223835] [2022-02-15 13:25:41,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:25:41,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:25:41,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:41,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:25:41,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:25:41,651 INFO L87 Difference]: Start difference. First operand 341 states and 1008 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-02-15 13:25:42,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:42,423 INFO L93 Difference]: Finished difference Result 553 states and 1619 transitions. [2022-02-15 13:25:42,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:25:42,423 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 24 [2022-02-15 13:25:42,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:42,425 INFO L225 Difference]: With dead ends: 553 [2022-02-15 13:25:42,425 INFO L226 Difference]: Without dead ends: 463 [2022-02-15 13:25:42,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:25:42,426 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 167 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:42,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 235 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:25:42,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-02-15 13:25:42,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 376. [2022-02-15 13:25:42,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.968) internal successors, (1113), 375 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) [2022-02-15 13:25:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1113 transitions. [2022-02-15 13:25:42,433 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1113 transitions. Word has length 24 [2022-02-15 13:25:42,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:42,433 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1113 transitions. [2022-02-15 13:25:42,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-02-15 13:25:42,433 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1113 transitions. [2022-02-15 13:25:42,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:25:42,434 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:42,434 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:42,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-15 13:25:42,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:42,650 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:42,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:42,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1933860043, now seen corresponding path program 5 times [2022-02-15 13:25:42,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:42,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618632467] [2022-02-15 13:25:42,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:42,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:25:42,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:42,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618632467] [2022-02-15 13:25:42,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618632467] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:25:42,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544145892] [2022-02-15 13:25:42,833 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:25:42,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:42,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:25:42,834 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) [2022-02-15 13:25:42,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-15 13:25:42,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:25:42,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:25:42,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:25:42,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:25:42,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:25:42,999 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 30 treesize of output 24 [2022-02-15 13:25:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:25:43,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:25:43,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:25:43,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:25:43,670 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:25:43,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:25:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:25:43,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544145892] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:25:43,676 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:25:43,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-15 13:25:43,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556826333] [2022-02-15 13:25:43,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:25:43,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:25:43,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:43,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:25:43,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:25:43,678 INFO L87 Difference]: Start difference. First operand 376 states and 1113 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) [2022-02-15 13:25:44,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:44,229 INFO L93 Difference]: Finished difference Result 572 states and 1638 transitions. [2022-02-15 13:25:44,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:25:44,230 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 24 [2022-02-15 13:25:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:44,232 INFO L225 Difference]: With dead ends: 572 [2022-02-15 13:25:44,232 INFO L226 Difference]: Without dead ends: 495 [2022-02-15 13:25:44,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:25:44,232 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 140 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:44,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 231 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:25:44,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-02-15 13:25:44,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 390. [2022-02-15 13:25:44,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0231362467866325) internal successors, (1176), 389 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) [2022-02-15 13:25:44,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1176 transitions. [2022-02-15 13:25:44,240 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1176 transitions. Word has length 24 [2022-02-15 13:25:44,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:44,240 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 1176 transitions. [2022-02-15 13:25:44,240 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) [2022-02-15 13:25:44,240 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1176 transitions. [2022-02-15 13:25:44,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:25:44,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:44,241 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:44,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-15 13:25:44,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:44,458 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:44,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:44,458 INFO L85 PathProgramCache]: Analyzing trace with hash 212310717, now seen corresponding path program 6 times [2022-02-15 13:25:44,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:44,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762708783] [2022-02-15 13:25:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:44,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:25:44,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:44,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762708783] [2022-02-15 13:25:44,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762708783] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:25:44,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990314863] [2022-02-15 13:25:44,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:25:44,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:44,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:25:44,655 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) [2022-02-15 13:25:44,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-15 13:25:44,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:25:44,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:25:44,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:25:44,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:25:44,787 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 26 treesize of output 20 [2022-02-15 13:25:44,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:25:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:25:44,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:25:45,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:25:45,317 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 81 treesize of output 74 [2022-02-15 13:25:45,459 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:25:45,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:25:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:25:45,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990314863] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:25:45,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:25:45,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-02-15 13:25:45,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736621342] [2022-02-15 13:25:45,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:25:45,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 13:25:45,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:45,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 13:25:45,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-02-15 13:25:45,465 INFO L87 Difference]: Start difference. First operand 390 states and 1176 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2022-02-15 13:25:45,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:45,862 INFO L93 Difference]: Finished difference Result 508 states and 1523 transitions. [2022-02-15 13:25:45,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:25:45,862 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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 24 [2022-02-15 13:25:45,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:45,864 INFO L225 Difference]: With dead ends: 508 [2022-02-15 13:25:45,864 INFO L226 Difference]: Without dead ends: 477 [2022-02-15 13:25:45,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:25:45,865 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 112 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:45,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 201 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:25:45,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-02-15 13:25:45,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 419. [2022-02-15 13:25:45,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 3.0526315789473686) internal successors, (1276), 418 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1276 transitions. [2022-02-15 13:25:45,873 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1276 transitions. Word has length 24 [2022-02-15 13:25:45,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:45,873 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 1276 transitions. [2022-02-15 13:25:45,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 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) [2022-02-15 13:25:45,873 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1276 transitions. [2022-02-15 13:25:45,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:25:45,874 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:45,874 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:45,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-15 13:25:46,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:46,093 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:46,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:46,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1190228181, now seen corresponding path program 7 times [2022-02-15 13:25:46,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:46,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936721405] [2022-02-15 13:25:46,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:46,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:46,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:46,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936721405] [2022-02-15 13:25:46,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936721405] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:25:46,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244734057] [2022-02-15 13:25:46,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:25:46,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:46,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:25:46,284 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) [2022-02-15 13:25:46,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-15 13:25:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:46,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:25:46,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:25:46,405 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 26 treesize of output 20 [2022-02-15 13:25:46,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-02-15 13:25:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:46,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:25:46,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:25:46,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-15 13:25:47,107 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:25:47,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-15 13:25:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:47,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244734057] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:25:47,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:25:47,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-15 13:25:47,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867687825] [2022-02-15 13:25:47,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:25:47,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:25:47,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:47,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:25:47,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:25:47,112 INFO L87 Difference]: Start difference. First operand 419 states and 1276 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:47,626 INFO L93 Difference]: Finished difference Result 628 states and 1872 transitions. [2022-02-15 13:25:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:25:47,627 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:25:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:47,629 INFO L225 Difference]: With dead ends: 628 [2022-02-15 13:25:47,629 INFO L226 Difference]: Without dead ends: 538 [2022-02-15 13:25:47,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:25:47,629 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 173 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:47,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 174 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:25:47,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-02-15 13:25:47,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 446. [2022-02-15 13:25:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 3.049438202247191) internal successors, (1357), 445 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:47,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1357 transitions. [2022-02-15 13:25:47,638 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1357 transitions. Word has length 24 [2022-02-15 13:25:47,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:47,638 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 1357 transitions. [2022-02-15 13:25:47,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:47,638 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1357 transitions. [2022-02-15 13:25:47,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:25:47,639 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:47,639 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:47,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-15 13:25:47,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:47,855 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:47,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:47,856 INFO L85 PathProgramCache]: Analyzing trace with hash 889065647, now seen corresponding path program 8 times [2022-02-15 13:25:47,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:47,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627239570] [2022-02-15 13:25:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:47,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:48,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:48,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:48,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627239570] [2022-02-15 13:25:48,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627239570] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:25:48,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135869598] [2022-02-15 13:25:48,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:25:48,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:48,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:25:48,049 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) [2022-02-15 13:25:48,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-15 13:25:48,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:25:48,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:25:48,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:25:48,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:25:48,165 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 26 treesize of output 20 [2022-02-15 13:25:48,198 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 30 treesize of output 24 [2022-02-15 13:25:48,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:48,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:25:48,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:25:48,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-02-15 13:25:48,835 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:25:48,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:25:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:48,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135869598] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:25:48,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:25:48,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-02-15 13:25:48,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73233790] [2022-02-15 13:25:48,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:25:48,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 13:25:48,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:48,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 13:25:48,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-02-15 13:25:48,840 INFO L87 Difference]: Start difference. First operand 446 states and 1357 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) [2022-02-15 13:25:49,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:49,468 INFO L93 Difference]: Finished difference Result 784 states and 2246 transitions. [2022-02-15 13:25:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:25:49,468 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 24 [2022-02-15 13:25:49,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:49,471 INFO L225 Difference]: With dead ends: 784 [2022-02-15 13:25:49,471 INFO L226 Difference]: Without dead ends: 615 [2022-02-15 13:25:49,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:25:49,472 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 229 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:49,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 237 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:25:49,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-02-15 13:25:49,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 460. [2022-02-15 13:25:49,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.093681917211329) internal successors, (1420), 459 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:49,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1420 transitions. [2022-02-15 13:25:49,482 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1420 transitions. Word has length 24 [2022-02-15 13:25:49,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:49,482 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1420 transitions. [2022-02-15 13:25:49,483 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) [2022-02-15 13:25:49,483 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1420 transitions. [2022-02-15 13:25:49,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:25:49,485 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:49,485 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:49,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-15 13:25:49,703 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,SelfDestructingSolverStorable23 [2022-02-15 13:25:49,704 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:49,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:49,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1259730889, now seen corresponding path program 9 times [2022-02-15 13:25:49,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:49,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224608586] [2022-02-15 13:25:49,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:49,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:49,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:49,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224608586] [2022-02-15 13:25:49,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224608586] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:25:49,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916480484] [2022-02-15 13:25:49,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:25:49,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:49,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:25:49,853 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) [2022-02-15 13:25:49,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-15 13:25:49,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:25:49,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:25:49,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:25:49,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:25:49,965 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 26 treesize of output 20 [2022-02-15 13:25:49,991 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 30 treesize of output 24 [2022-02-15 13:25:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:50,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:25:50,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:25:50,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-02-15 13:25:50,644 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:25:50,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:25:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:50,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916480484] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:25:50,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:25:50,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-15 13:25:50,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551573400] [2022-02-15 13:25:50,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:25:50,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:25:50,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:50,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:25:50,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:25:50,649 INFO L87 Difference]: Start difference. First operand 460 states and 1420 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) [2022-02-15 13:25:51,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:51,202 INFO L93 Difference]: Finished difference Result 629 states and 1941 transitions. [2022-02-15 13:25:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:25:51,203 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 24 [2022-02-15 13:25:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:51,205 INFO L225 Difference]: With dead ends: 629 [2022-02-15 13:25:51,205 INFO L226 Difference]: Without dead ends: 583 [2022-02-15 13:25:51,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:25:51,206 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 139 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:51,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 232 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:25:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-02-15 13:25:51,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 474. [2022-02-15 13:25:51,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 3.120507399577167) internal successors, (1476), 473 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1476 transitions. [2022-02-15 13:25:51,214 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1476 transitions. Word has length 24 [2022-02-15 13:25:51,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:51,214 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1476 transitions. [2022-02-15 13:25:51,214 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) [2022-02-15 13:25:51,214 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1476 transitions. [2022-02-15 13:25:51,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:25:51,215 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:51,215 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:51,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-15 13:25:51,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-02-15 13:25:51,433 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:51,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:51,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1941144819, now seen corresponding path program 10 times [2022-02-15 13:25:51,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:51,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445186052] [2022-02-15 13:25:51,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:51,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:51,601 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:51,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445186052] [2022-02-15 13:25:51,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445186052] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:25:51,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303733058] [2022-02-15 13:25:51,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:25:51,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:51,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:25:51,603 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) [2022-02-15 13:25:51,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-15 13:25:51,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:25:51,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:25:51,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:25:51,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:25:51,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:25:51,796 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 30 treesize of output 24 [2022-02-15 13:25:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:51,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:25:52,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:25:52,387 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 120 treesize of output 104 [2022-02-15 13:25:52,491 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:25:52,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:25:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:52,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303733058] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:25:52,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:25:52,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-15 13:25:52,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579789250] [2022-02-15 13:25:52,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:25:52,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:25:52,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:52,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:25:52,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:25:52,498 INFO L87 Difference]: Start difference. First operand 474 states and 1476 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) [2022-02-15 13:25:52,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:52,950 INFO L93 Difference]: Finished difference Result 789 states and 2385 transitions. [2022-02-15 13:25:52,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:25:52,951 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 24 [2022-02-15 13:25:52,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:52,953 INFO L225 Difference]: With dead ends: 789 [2022-02-15 13:25:52,953 INFO L226 Difference]: Without dead ends: 727 [2022-02-15 13:25:52,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:25:52,954 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 124 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:52,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 220 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:25:52,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2022-02-15 13:25:52,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 514. [2022-02-15 13:25:52,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.1091617933723197) internal successors, (1595), 513 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:52,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1595 transitions. [2022-02-15 13:25:52,966 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1595 transitions. Word has length 24 [2022-02-15 13:25:52,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:52,966 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1595 transitions. [2022-02-15 13:25:52,967 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) [2022-02-15 13:25:52,967 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1595 transitions. [2022-02-15 13:25:52,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:25:52,968 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:52,968 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:53,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-15 13:25:53,184 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,SelfDestructingSolverStorable25 [2022-02-15 13:25:53,185 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:53,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:53,186 INFO L85 PathProgramCache]: Analyzing trace with hash 542857643, now seen corresponding path program 11 times [2022-02-15 13:25:53,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:53,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351987683] [2022-02-15 13:25:53,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:53,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:53,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:53,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351987683] [2022-02-15 13:25:53,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351987683] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:25:53,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881166890] [2022-02-15 13:25:53,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:25:53,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:53,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:25:53,366 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) [2022-02-15 13:25:53,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-15 13:25:53,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:25:53,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:25:53,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:25:53,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:25:53,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:25:53,657 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 26 treesize of output 22 [2022-02-15 13:25:53,704 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:53,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:25:54,216 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:25:54,217 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 120 treesize of output 104 [2022-02-15 13:25:54,307 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:25:54,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:25:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:54,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881166890] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:25:54,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:25:54,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:25:54,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016770485] [2022-02-15 13:25:54,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:25:54,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:25:54,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:54,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:25:54,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:25:54,313 INFO L87 Difference]: Start difference. First operand 514 states and 1595 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:55,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:55,574 INFO L93 Difference]: Finished difference Result 1109 states and 3320 transitions. [2022-02-15 13:25:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:25:55,575 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:25:55,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:55,583 INFO L225 Difference]: With dead ends: 1109 [2022-02-15 13:25:55,584 INFO L226 Difference]: Without dead ends: 1051 [2022-02-15 13:25:55,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:25:55,584 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 206 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:55,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 331 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:25:55,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-02-15 13:25:55,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 548. [2022-02-15 13:25:55,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 3.096892138939671) internal successors, (1694), 547 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:55,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1694 transitions. [2022-02-15 13:25:55,621 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1694 transitions. Word has length 24 [2022-02-15 13:25:55,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:55,621 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 1694 transitions. [2022-02-15 13:25:55,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:55,621 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1694 transitions. [2022-02-15 13:25:55,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:25:55,622 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:55,622 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:55,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-15 13:25:55,835 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,SelfDestructingSolverStorable26 [2022-02-15 13:25:55,835 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:55,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1559402575, now seen corresponding path program 12 times [2022-02-15 13:25:55,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:55,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710344850] [2022-02-15 13:25:55,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:55,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:56,005 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:56,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710344850] [2022-02-15 13:25:56,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710344850] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:25:56,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267790428] [2022-02-15 13:25:56,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:25:56,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:56,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:25:56,020 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) [2022-02-15 13:25:56,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-15 13:25:56,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:25:56,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:25:56,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:25:56,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:25:56,127 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 41 treesize of output 35 [2022-02-15 13:25:56,307 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 30 treesize of output 24 [2022-02-15 13:25:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:56,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:25:56,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:25:56,938 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 120 treesize of output 104 [2022-02-15 13:25:57,025 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:25:57,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:25:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:57,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267790428] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:25:57,029 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:25:57,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:25:57,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220261069] [2022-02-15 13:25:57,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:25:57,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:25:57,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:57,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:25:57,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:25:57,030 INFO L87 Difference]: Start difference. First operand 548 states and 1694 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-02-15 13:25:58,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:25:58,187 INFO L93 Difference]: Finished difference Result 960 states and 2842 transitions. [2022-02-15 13:25:58,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:25:58,187 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 24 [2022-02-15 13:25:58,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:25:58,190 INFO L225 Difference]: With dead ends: 960 [2022-02-15 13:25:58,190 INFO L226 Difference]: Without dead ends: 898 [2022-02-15 13:25:58,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:25:58,191 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 150 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:25:58,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 329 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:25:58,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-02-15 13:25:58,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 563. [2022-02-15 13:25:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 3.099644128113879) internal successors, (1742), 562 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:25:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1742 transitions. [2022-02-15 13:25:58,201 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1742 transitions. Word has length 24 [2022-02-15 13:25:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:25:58,201 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 1742 transitions. [2022-02-15 13:25:58,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-02-15 13:25:58,202 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1742 transitions. [2022-02-15 13:25:58,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:25:58,203 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:25:58,203 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:25:58,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-02-15 13:25:58,405 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,SelfDestructingSolverStorable27 [2022-02-15 13:25:58,405 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:25:58,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:25:58,406 INFO L85 PathProgramCache]: Analyzing trace with hash -395469401, now seen corresponding path program 13 times [2022-02-15 13:25:58,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:25:58,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405574074] [2022-02-15 13:25:58,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:25:58,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:25:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:58,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:58,593 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:25:58,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405574074] [2022-02-15 13:25:58,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405574074] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:25:58,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872506763] [2022-02-15 13:25:58,593 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:25:58,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:25:58,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:25:58,594 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) [2022-02-15 13:25:58,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-15 13:25:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:25:58,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:25:58,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:25:58,682 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 41 treesize of output 35 [2022-02-15 13:25:58,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:25:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:58,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:25:59,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:25:59,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-15 13:25:59,335 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:25:59,336 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 32 treesize of output 29 [2022-02-15 13:25:59,339 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:25:59,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872506763] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:25:59,339 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:25:59,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:25:59,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232362294] [2022-02-15 13:25:59,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:25:59,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:25:59,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:25:59,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:25:59,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:25:59,341 INFO L87 Difference]: Start difference. First operand 563 states and 1742 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:02,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:02,541 INFO L93 Difference]: Finished difference Result 1818 states and 5030 transitions. [2022-02-15 13:26:02,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 13:26:02,541 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:02,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:02,547 INFO L225 Difference]: With dead ends: 1818 [2022-02-15 13:26:02,547 INFO L226 Difference]: Without dead ends: 1606 [2022-02-15 13:26:02,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=816, Invalid=3606, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 13:26:02,552 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 404 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:02,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 510 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1521 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:26:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2022-02-15 13:26:02,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 611. [2022-02-15 13:26:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 3.121311475409836) internal successors, (1904), 610 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1904 transitions. [2022-02-15 13:26:02,577 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1904 transitions. Word has length 24 [2022-02-15 13:26:02,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:02,577 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 1904 transitions. [2022-02-15 13:26:02,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:02,577 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1904 transitions. [2022-02-15 13:26:02,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:02,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:02,581 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:02,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:02,797 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,SelfDestructingSolverStorable28 [2022-02-15 13:26:02,798 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:02,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:02,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1939707733, now seen corresponding path program 14 times [2022-02-15 13:26:02,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:02,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686193493] [2022-02-15 13:26:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:02,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:02,971 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:02,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:02,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686193493] [2022-02-15 13:26:02,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686193493] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:02,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950222691] [2022-02-15 13:26:02,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:26:02,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:02,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:02,973 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) [2022-02-15 13:26:02,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-15 13:26:03,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:26:03,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:03,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:03,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:03,046 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 41 treesize of output 35 [2022-02-15 13:26:03,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-15 13:26:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:03,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:03,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:03,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-02-15 13:26:03,515 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:03,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:26:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:03,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950222691] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:03,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:03,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:26:03,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746959461] [2022-02-15 13:26:03,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:03,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:26:03,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:03,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:26:03,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:26:03,519 INFO L87 Difference]: Start difference. First operand 611 states and 1904 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-02-15 13:26:05,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:05,219 INFO L93 Difference]: Finished difference Result 1679 states and 4891 transitions. [2022-02-15 13:26:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 13:26:05,219 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 24 [2022-02-15 13:26:05,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:05,224 INFO L225 Difference]: With dead ends: 1679 [2022-02-15 13:26:05,225 INFO L226 Difference]: Without dead ends: 1456 [2022-02-15 13:26:05,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=343, Invalid=1379, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 13:26:05,225 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 253 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:05,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 453 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1441 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:26:05,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2022-02-15 13:26:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 623. [2022-02-15 13:26:05,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 3.1286173633440515) internal successors, (1946), 622 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 1946 transitions. [2022-02-15 13:26:05,238 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 1946 transitions. Word has length 24 [2022-02-15 13:26:05,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:05,239 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 1946 transitions. [2022-02-15 13:26:05,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-02-15 13:26:05,239 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 1946 transitions. [2022-02-15 13:26:05,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:05,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:05,240 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:05,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:05,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:05,456 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:05,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:05,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1047496429, now seen corresponding path program 15 times [2022-02-15 13:26:05,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:05,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690674212] [2022-02-15 13:26:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:05,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:05,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:05,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690674212] [2022-02-15 13:26:05,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690674212] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:05,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226757776] [2022-02-15 13:26:05,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:26:05,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:05,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:05,655 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) [2022-02-15 13:26:05,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-15 13:26:05,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:26:05,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:05,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:26:05,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:05,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:26:05,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:26:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:05,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:06,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:06,499 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 78 treesize of output 70 [2022-02-15 13:26:06,606 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:06,606 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 32 treesize of output 29 [2022-02-15 13:26:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:06,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226757776] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:06,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:06,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:26:06,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392010740] [2022-02-15 13:26:06,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:06,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:26:06,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:06,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:26:06,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:26:06,612 INFO L87 Difference]: Start difference. First operand 623 states and 1946 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:09,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:09,450 INFO L93 Difference]: Finished difference Result 1678 states and 4733 transitions. [2022-02-15 13:26:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 13:26:09,450 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:09,455 INFO L225 Difference]: With dead ends: 1678 [2022-02-15 13:26:09,455 INFO L226 Difference]: Without dead ends: 1416 [2022-02-15 13:26:09,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=721, Invalid=3439, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 13:26:09,460 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 254 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:09,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 509 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:26:09,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2022-02-15 13:26:09,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 670. [2022-02-15 13:26:09,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 3.1420029895366217) internal successors, (2102), 669 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:09,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2102 transitions. [2022-02-15 13:26:09,474 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2102 transitions. Word has length 24 [2022-02-15 13:26:09,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:09,474 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 2102 transitions. [2022-02-15 13:26:09,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:09,474 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2102 transitions. [2022-02-15 13:26:09,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:09,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:09,500 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:09,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-02-15 13:26:09,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:09,701 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:09,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:09,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1089687221, now seen corresponding path program 16 times [2022-02-15 13:26:09,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:09,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913220632] [2022-02-15 13:26:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:09,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:09,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:09,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913220632] [2022-02-15 13:26:09,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913220632] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:09,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097742599] [2022-02-15 13:26:09,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:26:09,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:09,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:09,905 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) [2022-02-15 13:26:09,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-15 13:26:09,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:26:09,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:09,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:26:09,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:10,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:26:10,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:26:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:10,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:10,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:10,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-15 13:26:10,987 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:10,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-15 13:26:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:10,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097742599] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:10,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:10,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:26:10,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252966150] [2022-02-15 13:26:10,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:10,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:26:10,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:10,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:26:10,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:26:10,993 INFO L87 Difference]: Start difference. First operand 670 states and 2102 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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) [2022-02-15 13:26:12,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:12,195 INFO L93 Difference]: Finished difference Result 1309 states and 3896 transitions. [2022-02-15 13:26:12,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 13:26:12,195 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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 24 [2022-02-15 13:26:12,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:12,199 INFO L225 Difference]: With dead ends: 1309 [2022-02-15 13:26:12,199 INFO L226 Difference]: Without dead ends: 1191 [2022-02-15 13:26:12,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=329, Invalid=1651, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 13:26:12,199 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 174 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:12,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 357 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:26:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2022-02-15 13:26:12,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 684. [2022-02-15 13:26:12,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 3.1317715959004393) internal successors, (2139), 683 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:12,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2139 transitions. [2022-02-15 13:26:12,211 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2139 transitions. Word has length 24 [2022-02-15 13:26:12,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:12,212 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 2139 transitions. [2022-02-15 13:26:12,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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) [2022-02-15 13:26:12,212 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2139 transitions. [2022-02-15 13:26:12,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:12,213 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:12,213 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:12,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:12,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:12,429 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:12,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:12,429 INFO L85 PathProgramCache]: Analyzing trace with hash -957667723, now seen corresponding path program 17 times [2022-02-15 13:26:12,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:12,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416946388] [2022-02-15 13:26:12,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:12,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:12,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:12,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416946388] [2022-02-15 13:26:12,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416946388] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:12,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852230204] [2022-02-15 13:26:12,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:26:12,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:12,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:12,622 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) [2022-02-15 13:26:12,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-15 13:26:12,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:26:12,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:12,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:12,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:12,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:12,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:26:13,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:13,030 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:26:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:13,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:13,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:13,884 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 120 treesize of output 104 [2022-02-15 13:26:13,992 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:13,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:26:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:13,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852230204] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:13,997 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:13,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:26:13,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507749122] [2022-02-15 13:26:13,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:13,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:26:13,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:13,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:26:13,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:26:13,999 INFO L87 Difference]: Start difference. First operand 684 states and 2139 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) [2022-02-15 13:26:14,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:14,198 INFO L93 Difference]: Finished difference Result 770 states and 2388 transitions. [2022-02-15 13:26:14,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:26:14,198 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 24 [2022-02-15 13:26:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:14,200 INFO L225 Difference]: With dead ends: 770 [2022-02-15 13:26:14,200 INFO L226 Difference]: Without dead ends: 751 [2022-02-15 13:26:14,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:26:14,201 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 83 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:14,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 175 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 380 Invalid, 0 Unknown, 255 Unchecked, 0.2s Time] [2022-02-15 13:26:14,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-02-15 13:26:14,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 684. [2022-02-15 13:26:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 3.1317715959004393) internal successors, (2139), 683 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 2139 transitions. [2022-02-15 13:26:14,210 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 2139 transitions. Word has length 24 [2022-02-15 13:26:14,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:14,210 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 2139 transitions. [2022-02-15 13:26:14,210 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) [2022-02-15 13:26:14,210 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 2139 transitions. [2022-02-15 13:26:14,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:14,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:14,211 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:14,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-02-15 13:26:14,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:14,428 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:14,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1470118745, now seen corresponding path program 18 times [2022-02-15 13:26:14,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:14,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784562061] [2022-02-15 13:26:14,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:14,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:14,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:14,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:14,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784562061] [2022-02-15 13:26:14,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784562061] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:14,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555429884] [2022-02-15 13:26:14,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:26:14,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:14,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:14,634 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) [2022-02-15 13:26:14,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-15 13:26:14,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:26:14,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:14,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:14,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:14,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:14,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:26:14,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:14,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:26:15,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:15,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:15,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:15,513 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 52 treesize of output 49 [2022-02-15 13:26:15,548 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:15,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:26:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:15,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555429884] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:15,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:15,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:26:15,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163549147] [2022-02-15 13:26:15,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:15,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:26:15,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:15,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:26:15,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:26:15,553 INFO L87 Difference]: Start difference. First operand 684 states and 2139 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-02-15 13:26:15,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:15,878 INFO L93 Difference]: Finished difference Result 813 states and 2503 transitions. [2022-02-15 13:26:15,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:26:15,878 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 24 [2022-02-15 13:26:15,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:15,880 INFO L225 Difference]: With dead ends: 813 [2022-02-15 13:26:15,880 INFO L226 Difference]: Without dead ends: 772 [2022-02-15 13:26:15,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:26:15,883 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 94 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:15,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 252 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 512 Invalid, 0 Unknown, 268 Unchecked, 0.2s Time] [2022-02-15 13:26:15,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-02-15 13:26:15,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 670. [2022-02-15 13:26:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 3.1225710014947685) internal successors, (2089), 669 states have internal predecessors, (2089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2089 transitions. [2022-02-15 13:26:15,892 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2089 transitions. Word has length 24 [2022-02-15 13:26:15,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:15,892 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 2089 transitions. [2022-02-15 13:26:15,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-02-15 13:26:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2089 transitions. [2022-02-15 13:26:15,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:15,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:15,893 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:15,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:16,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:16,107 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:16,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:16,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1719337217, now seen corresponding path program 19 times [2022-02-15 13:26:16,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:16,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947768778] [2022-02-15 13:26:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:16,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:16,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:16,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947768778] [2022-02-15 13:26:16,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947768778] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:16,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176583651] [2022-02-15 13:26:16,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:26:16,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:16,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:16,303 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) [2022-02-15 13:26:16,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-15 13:26:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:16,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:16,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:16,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-15 13:26:16,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-15 13:26:16,488 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 12 treesize of output 8 [2022-02-15 13:26:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:16,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:17,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:17,066 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 120 treesize of output 104 [2022-02-15 13:26:17,198 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:17,198 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 20 treesize of output 19 [2022-02-15 13:26:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:17,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176583651] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:17,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:17,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:26:17,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965285464] [2022-02-15 13:26:17,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:17,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:26:17,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:17,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:26:17,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:26:17,203 INFO L87 Difference]: Start difference. First operand 670 states and 2089 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:18,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:18,076 INFO L93 Difference]: Finished difference Result 1228 states and 3714 transitions. [2022-02-15 13:26:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:26:18,077 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:18,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:18,079 INFO L225 Difference]: With dead ends: 1228 [2022-02-15 13:26:18,079 INFO L226 Difference]: Without dead ends: 1114 [2022-02-15 13:26:18,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:26:18,080 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 172 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:18,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 284 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1026 Invalid, 0 Unknown, 18 Unchecked, 0.4s Time] [2022-02-15 13:26:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-02-15 13:26:18,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 682. [2022-02-15 13:26:18,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 3.0954478707782673) internal successors, (2108), 681 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:18,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 2108 transitions. [2022-02-15 13:26:18,091 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 2108 transitions. Word has length 24 [2022-02-15 13:26:18,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:18,091 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 2108 transitions. [2022-02-15 13:26:18,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:18,091 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 2108 transitions. [2022-02-15 13:26:18,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:18,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:18,092 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:18,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:18,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:18,313 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:18,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:18,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1670091215, now seen corresponding path program 20 times [2022-02-15 13:26:18,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:18,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584136771] [2022-02-15 13:26:18,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:18,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:18,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:18,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:18,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584136771] [2022-02-15 13:26:18,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584136771] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:18,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681895607] [2022-02-15 13:26:18,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:26:18,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:18,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:18,485 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) [2022-02-15 13:26:18,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-15 13:26:18,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:26:18,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:18,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:18,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:18,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:26:18,698 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 30 treesize of output 24 [2022-02-15 13:26:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:18,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:19,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:19,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-02-15 13:26:19,208 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:19,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:26:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:19,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681895607] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:19,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:19,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-15 13:26:19,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28239012] [2022-02-15 13:26:19,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:19,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:26:19,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:19,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:26:19,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:26:19,214 INFO L87 Difference]: Start difference. First operand 682 states and 2108 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2022-02-15 13:26:19,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:19,604 INFO L93 Difference]: Finished difference Result 894 states and 2734 transitions. [2022-02-15 13:26:19,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:26:19,605 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 24 [2022-02-15 13:26:19,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:19,607 INFO L225 Difference]: With dead ends: 894 [2022-02-15 13:26:19,607 INFO L226 Difference]: Without dead ends: 835 [2022-02-15 13:26:19,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:26:19,607 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 109 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:19,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 218 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:26:19,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-02-15 13:26:19,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 696. [2022-02-15 13:26:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 3.093525179856115) internal successors, (2150), 695 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 2150 transitions. [2022-02-15 13:26:19,617 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 2150 transitions. Word has length 24 [2022-02-15 13:26:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:19,617 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 2150 transitions. [2022-02-15 13:26:19,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2022-02-15 13:26:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 2150 transitions. [2022-02-15 13:26:19,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:19,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:19,618 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:19,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:19,819 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,SelfDestructingSolverStorable35 [2022-02-15 13:26:19,819 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:19,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:19,820 INFO L85 PathProgramCache]: Analyzing trace with hash 409202613, now seen corresponding path program 21 times [2022-02-15 13:26:19,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:19,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674109717] [2022-02-15 13:26:19,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:19,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:19,985 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:19,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:19,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674109717] [2022-02-15 13:26:19,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674109717] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:19,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092125521] [2022-02-15 13:26:19,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:26:19,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:19,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:19,987 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) [2022-02-15 13:26:19,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-15 13:26:20,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:26:20,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:20,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:20,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:20,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:26:20,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:26:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:20,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:20,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:20,633 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 72 treesize of output 65 [2022-02-15 13:26:20,774 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:20,774 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 28 treesize of output 25 [2022-02-15 13:26:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:20,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092125521] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:20,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:20,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-15 13:26:20,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902389456] [2022-02-15 13:26:20,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:20,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:26:20,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:20,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:26:20,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:26:20,789 INFO L87 Difference]: Start difference. First operand 696 states and 2150 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2022-02-15 13:26:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:21,256 INFO L93 Difference]: Finished difference Result 892 states and 2736 transitions. [2022-02-15 13:26:21,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:26:21,257 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 24 [2022-02-15 13:26:21,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:21,258 INFO L225 Difference]: With dead ends: 892 [2022-02-15 13:26:21,258 INFO L226 Difference]: Without dead ends: 861 [2022-02-15 13:26:21,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:26:21,259 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 102 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:21,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 255 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:26:21,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-02-15 13:26:21,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 696. [2022-02-15 13:26:21,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 695 states have (on average 3.093525179856115) internal successors, (2150), 695 states have internal predecessors, (2150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:21,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 2150 transitions. [2022-02-15 13:26:21,286 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 2150 transitions. Word has length 24 [2022-02-15 13:26:21,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:21,286 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 2150 transitions. [2022-02-15 13:26:21,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2022-02-15 13:26:21,286 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 2150 transitions. [2022-02-15 13:26:21,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:21,287 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:21,287 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:21,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:21,504 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,SelfDestructingSolverStorable36 [2022-02-15 13:26:21,504 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:21,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1739593923, now seen corresponding path program 22 times [2022-02-15 13:26:21,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:21,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309639969] [2022-02-15 13:26:21,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:21,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:21,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:21,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309639969] [2022-02-15 13:26:21,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309639969] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:21,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622653126] [2022-02-15 13:26:21,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:26:21,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:21,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:21,667 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) [2022-02-15 13:26:21,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-15 13:26:21,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:26:21,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:21,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:26:21,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:21,817 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 26 treesize of output 20 [2022-02-15 13:26:21,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:26:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:21,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:22,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:22,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-15 13:26:22,676 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:22,676 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 32 treesize of output 29 [2022-02-15 13:26:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:22,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622653126] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:22,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:22,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:26:22,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408205304] [2022-02-15 13:26:22,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:22,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:26:22,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:22,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:26:22,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:26:22,681 INFO L87 Difference]: Start difference. First operand 696 states and 2150 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-02-15 13:26:23,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:23,911 INFO L93 Difference]: Finished difference Result 1303 states and 3796 transitions. [2022-02-15 13:26:23,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:26:23,912 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 24 [2022-02-15 13:26:23,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:23,914 INFO L225 Difference]: With dead ends: 1303 [2022-02-15 13:26:23,914 INFO L226 Difference]: Without dead ends: 1094 [2022-02-15 13:26:23,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:26:23,915 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 231 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:23,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 309 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:26:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-02-15 13:26:23,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 730. [2022-02-15 13:26:23,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.1275720164609053) internal successors, (2280), 729 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2280 transitions. [2022-02-15 13:26:23,926 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2280 transitions. Word has length 24 [2022-02-15 13:26:23,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:23,927 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 2280 transitions. [2022-02-15 13:26:23,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-02-15 13:26:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2280 transitions. [2022-02-15 13:26:23,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:23,928 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:23,928 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:23,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:24,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-02-15 13:26:24,129 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:24,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:24,129 INFO L85 PathProgramCache]: Analyzing trace with hash 170403073, now seen corresponding path program 23 times [2022-02-15 13:26:24,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:24,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589881745] [2022-02-15 13:26:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:24,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:24,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:24,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589881745] [2022-02-15 13:26:24,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589881745] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:24,324 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513598104] [2022-02-15 13:26:24,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:26:24,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:24,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:24,325 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) [2022-02-15 13:26:24,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-15 13:26:24,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:26:24,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:24,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:24,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:24,455 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 41 treesize of output 35 [2022-02-15 13:26:24,610 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 30 treesize of output 24 [2022-02-15 13:26:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:24,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:25,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:25,227 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 141 treesize of output 121 [2022-02-15 13:26:25,397 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:25,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:26:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:25,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513598104] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:25,401 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:25,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:26:25,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195525782] [2022-02-15 13:26:25,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:25,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:26:25,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:25,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:26:25,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:26:25,402 INFO L87 Difference]: Start difference. First operand 730 states and 2280 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-02-15 13:26:26,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:26,199 INFO L93 Difference]: Finished difference Result 920 states and 2855 transitions. [2022-02-15 13:26:26,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:26:26,199 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 24 [2022-02-15 13:26:26,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:26,201 INFO L225 Difference]: With dead ends: 920 [2022-02-15 13:26:26,201 INFO L226 Difference]: Without dead ends: 889 [2022-02-15 13:26:26,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:26:26,202 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 104 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:26,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 253 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:26:26,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-02-15 13:26:26,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 750. [2022-02-15 13:26:26,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.129506008010681) internal successors, (2344), 749 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2344 transitions. [2022-02-15 13:26:26,213 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2344 transitions. Word has length 24 [2022-02-15 13:26:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:26,213 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2344 transitions. [2022-02-15 13:26:26,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-02-15 13:26:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2344 transitions. [2022-02-15 13:26:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:26,215 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:26,215 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:26,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:26,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:26,431 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1334336247, now seen corresponding path program 24 times [2022-02-15 13:26:26,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:26,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596782149] [2022-02-15 13:26:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:26,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:26,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:26,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596782149] [2022-02-15 13:26:26,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596782149] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:26,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962042913] [2022-02-15 13:26:26,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:26:26,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:26,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:26,622 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) [2022-02-15 13:26:26,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-15 13:26:26,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:26:26,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:26,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:26,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:26,755 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 41 treesize of output 35 [2022-02-15 13:26:26,840 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 47 treesize of output 41 [2022-02-15 13:26:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:26,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:27,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:27,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:26:27,651 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:27,652 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 20 treesize of output 19 [2022-02-15 13:26:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:27,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962042913] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:27,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:27,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:26:27,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315252731] [2022-02-15 13:26:27,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:27,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:26:27,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:27,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:26:27,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:26:27,656 INFO L87 Difference]: Start difference. First operand 750 states and 2344 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:28,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:28,925 INFO L93 Difference]: Finished difference Result 1191 states and 3653 transitions. [2022-02-15 13:26:28,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 13:26:28,925 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:28,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:28,927 INFO L225 Difference]: With dead ends: 1191 [2022-02-15 13:26:28,927 INFO L226 Difference]: Without dead ends: 1090 [2022-02-15 13:26:28,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 13:26:28,928 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 155 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:28,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 320 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:26:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-02-15 13:26:28,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 746. [2022-02-15 13:26:28,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 3.138255033557047) internal successors, (2338), 745 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:28,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 2338 transitions. [2022-02-15 13:26:28,940 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 2338 transitions. Word has length 24 [2022-02-15 13:26:28,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:28,941 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 2338 transitions. [2022-02-15 13:26:28,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:28,941 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 2338 transitions. [2022-02-15 13:26:28,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:28,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:28,942 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:28,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:29,160 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,SelfDestructingSolverStorable39 [2022-02-15 13:26:29,161 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:29,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:29,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1987889663, now seen corresponding path program 25 times [2022-02-15 13:26:29,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:29,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744380136] [2022-02-15 13:26:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:29,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:29,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:29,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744380136] [2022-02-15 13:26:29,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744380136] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:29,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618598453] [2022-02-15 13:26:29,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:26:29,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:29,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:29,362 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) [2022-02-15 13:26:29,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-15 13:26:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:29,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:26:29,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:29,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:26:29,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:26:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:29,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:30,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:30,271 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 111 treesize of output 97 [2022-02-15 13:26:30,421 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:30,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-15 13:26:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:30,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618598453] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:30,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:30,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:26:30,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918729868] [2022-02-15 13:26:30,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:30,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:26:30,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:30,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:26:30,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:26:30,428 INFO L87 Difference]: Start difference. First operand 746 states and 2338 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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) [2022-02-15 13:26:31,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:31,275 INFO L93 Difference]: Finished difference Result 1079 states and 3267 transitions. [2022-02-15 13:26:31,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:26:31,275 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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 24 [2022-02-15 13:26:31,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:31,292 INFO L225 Difference]: With dead ends: 1079 [2022-02-15 13:26:31,292 INFO L226 Difference]: Without dead ends: 965 [2022-02-15 13:26:31,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:26:31,293 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 145 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:31,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 321 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:26:31,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-02-15 13:26:31,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 760. [2022-02-15 13:26:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 3.137022397891963) internal successors, (2381), 759 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 2381 transitions. [2022-02-15 13:26:31,304 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 2381 transitions. Word has length 24 [2022-02-15 13:26:31,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:31,304 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 2381 transitions. [2022-02-15 13:26:31,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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) [2022-02-15 13:26:31,304 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 2381 transitions. [2022-02-15 13:26:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:31,305 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:31,306 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:31,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:31,522 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,SelfDestructingSolverStorable40 [2022-02-15 13:26:31,522 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:31,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:31,522 INFO L85 PathProgramCache]: Analyzing trace with hash 259722689, now seen corresponding path program 26 times [2022-02-15 13:26:31,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:31,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140797363] [2022-02-15 13:26:31,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:31,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:31,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:31,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140797363] [2022-02-15 13:26:31,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140797363] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:31,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167842946] [2022-02-15 13:26:31,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:26:31,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:31,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:31,714 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) [2022-02-15 13:26:31,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-15 13:26:31,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:26:31,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:31,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:31,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:31,852 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 41 treesize of output 35 [2022-02-15 13:26:31,937 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 26 treesize of output 22 [2022-02-15 13:26:32,020 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:32,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:32,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:32,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 65 [2022-02-15 13:26:32,707 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:32,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-02-15 13:26:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:32,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167842946] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:32,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:32,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:26:32,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244538154] [2022-02-15 13:26:32,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:32,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:26:32,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:32,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:26:32,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:26:32,712 INFO L87 Difference]: Start difference. First operand 760 states and 2381 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:33,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:33,315 INFO L93 Difference]: Finished difference Result 1025 states and 3143 transitions. [2022-02-15 13:26:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:26:33,315 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:33,317 INFO L225 Difference]: With dead ends: 1025 [2022-02-15 13:26:33,318 INFO L226 Difference]: Without dead ends: 967 [2022-02-15 13:26:33,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:26:33,318 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 99 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:33,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 323 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:26:33,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2022-02-15 13:26:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 747. [2022-02-15 13:26:33,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 3.1394101876675604) internal successors, (2342), 746 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2342 transitions. [2022-02-15 13:26:33,328 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2342 transitions. Word has length 24 [2022-02-15 13:26:33,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:33,329 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 2342 transitions. [2022-02-15 13:26:33,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:33,329 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2342 transitions. [2022-02-15 13:26:33,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:33,330 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:33,330 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:33,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:33,530 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,SelfDestructingSolverStorable41 [2022-02-15 13:26:33,530 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:33,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:33,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1618009331, now seen corresponding path program 27 times [2022-02-15 13:26:33,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:33,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389124538] [2022-02-15 13:26:33,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:33,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:33,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:33,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389124538] [2022-02-15 13:26:33,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389124538] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:33,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718214409] [2022-02-15 13:26:33,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:26:33,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:33,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:33,778 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) [2022-02-15 13:26:33,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-15 13:26:33,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:26:33,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:33,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:33,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:33,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:33,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:26:34,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:34,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 41 [2022-02-15 13:26:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:34,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:34,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:34,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:26:34,973 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:34,974 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 28 treesize of output 25 [2022-02-15 13:26:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:34,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718214409] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:34,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:34,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:26:34,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552610620] [2022-02-15 13:26:34,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:34,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:26:34,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:34,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:26:34,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:26:34,980 INFO L87 Difference]: Start difference. First operand 747 states and 2342 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:35,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:35,460 INFO L93 Difference]: Finished difference Result 955 states and 2882 transitions. [2022-02-15 13:26:35,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:26:35,461 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:35,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:35,463 INFO L225 Difference]: With dead ends: 955 [2022-02-15 13:26:35,463 INFO L226 Difference]: Without dead ends: 835 [2022-02-15 13:26:35,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:26:35,463 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 119 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:35,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 216 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 477 Invalid, 0 Unknown, 167 Unchecked, 0.2s Time] [2022-02-15 13:26:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-02-15 13:26:35,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 748. [2022-02-15 13:26:35,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 747 states have (on average 3.14190093708166) internal successors, (2347), 747 states have internal predecessors, (2347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:35,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2347 transitions. [2022-02-15 13:26:35,473 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2347 transitions. Word has length 24 [2022-02-15 13:26:35,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:35,473 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 2347 transitions. [2022-02-15 13:26:35,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2347 transitions. [2022-02-15 13:26:35,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:35,474 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:35,474 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:35,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:35,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:35,691 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:35,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:35,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1869613713, now seen corresponding path program 28 times [2022-02-15 13:26:35,691 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:35,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931299459] [2022-02-15 13:26:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:35,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:35,929 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:35,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931299459] [2022-02-15 13:26:35,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931299459] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:35,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769231332] [2022-02-15 13:26:35,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:26:35,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:35,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:35,930 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) [2022-02-15 13:26:35,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-15 13:26:35,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:26:35,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:35,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:26:35,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:36,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:36,198 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:26:36,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:36,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:26:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:36,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:36,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:36,930 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 110 treesize of output 98 [2022-02-15 13:26:37,117 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:37,117 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 32 treesize of output 29 [2022-02-15 13:26:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:37,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769231332] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:37,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:37,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:26:37,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124987779] [2022-02-15 13:26:37,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:37,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:26:37,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:37,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:26:37,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:26:37,123 INFO L87 Difference]: Start difference. First operand 748 states and 2347 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:37,687 INFO L93 Difference]: Finished difference Result 1211 states and 3553 transitions. [2022-02-15 13:26:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:26:37,687 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:37,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:37,690 INFO L225 Difference]: With dead ends: 1211 [2022-02-15 13:26:37,690 INFO L226 Difference]: Without dead ends: 1058 [2022-02-15 13:26:37,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:26:37,691 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 138 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:37,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 290 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 660 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2022-02-15 13:26:37,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2022-02-15 13:26:37,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 780. [2022-02-15 13:26:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.1630295250320923) internal successors, (2464), 779 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:37,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2464 transitions. [2022-02-15 13:26:37,702 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2464 transitions. Word has length 24 [2022-02-15 13:26:37,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:37,702 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2464 transitions. [2022-02-15 13:26:37,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:37,703 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2464 transitions. [2022-02-15 13:26:37,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:37,704 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:37,704 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:37,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:37,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:37,920 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:37,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:37,920 INFO L85 PathProgramCache]: Analyzing trace with hash 371565185, now seen corresponding path program 29 times [2022-02-15 13:26:37,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:37,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640631656] [2022-02-15 13:26:37,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:37,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:38,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:38,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640631656] [2022-02-15 13:26:38,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640631656] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:38,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152963523] [2022-02-15 13:26:38,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:26:38,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:38,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:38,102 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) [2022-02-15 13:26:38,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-15 13:26:38,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:26:38,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:38,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:38,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:38,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:38,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:26:38,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:26:38,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:38,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 17 [2022-02-15 13:26:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:38,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:38,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:38,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:26:39,154 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:39,155 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 28 treesize of output 25 [2022-02-15 13:26:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:39,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152963523] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:39,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:39,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:26:39,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657984746] [2022-02-15 13:26:39,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:39,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:26:39,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:39,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:26:39,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:26:39,161 INFO L87 Difference]: Start difference. First operand 780 states and 2464 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:39,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:39,255 INFO L93 Difference]: Finished difference Result 885 states and 2752 transitions. [2022-02-15 13:26:39,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:26:39,255 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:39,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:39,257 INFO L225 Difference]: With dead ends: 885 [2022-02-15 13:26:39,257 INFO L226 Difference]: Without dead ends: 878 [2022-02-15 13:26:39,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:26:39,257 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 49 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:39,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 223 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 214 Invalid, 0 Unknown, 191 Unchecked, 0.1s Time] [2022-02-15 13:26:39,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2022-02-15 13:26:39,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 792. [2022-02-15 13:26:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.165613147914033) internal successors, (2504), 791 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2504 transitions. [2022-02-15 13:26:39,269 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2504 transitions. Word has length 24 [2022-02-15 13:26:39,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:39,269 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 2504 transitions. [2022-02-15 13:26:39,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:39,269 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2504 transitions. [2022-02-15 13:26:39,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:39,280 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:39,280 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:39,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:39,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:39,495 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:39,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:39,496 INFO L85 PathProgramCache]: Analyzing trace with hash 417352927, now seen corresponding path program 30 times [2022-02-15 13:26:39,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:39,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827388677] [2022-02-15 13:26:39,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:39,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:39,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:39,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827388677] [2022-02-15 13:26:39,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827388677] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:39,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599173157] [2022-02-15 13:26:39,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:26:39,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:39,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:39,635 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) [2022-02-15 13:26:39,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-15 13:26:39,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:26:39,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:39,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:26:39,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:39,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:39,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:26:39,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:39,891 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:26:39,893 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 22 treesize of output 14 [2022-02-15 13:26:39,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:39,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:40,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:40,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-15 13:26:40,395 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:40,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-15 13:26:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:40,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599173157] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:40,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:40,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:26:40,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681451513] [2022-02-15 13:26:40,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:40,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:26:40,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:40,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:26:40,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:26:40,399 INFO L87 Difference]: Start difference. First operand 792 states and 2504 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:40,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:40,552 INFO L93 Difference]: Finished difference Result 882 states and 2723 transitions. [2022-02-15 13:26:40,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:26:40,553 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:40,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:40,555 INFO L225 Difference]: With dead ends: 882 [2022-02-15 13:26:40,555 INFO L226 Difference]: Without dead ends: 823 [2022-02-15 13:26:40,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:26:40,555 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:40,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 292 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 412 Invalid, 0 Unknown, 224 Unchecked, 0.1s Time] [2022-02-15 13:26:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-02-15 13:26:40,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 780. [2022-02-15 13:26:40,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.154043645699615) internal successors, (2457), 779 states have internal predecessors, (2457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:40,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2457 transitions. [2022-02-15 13:26:40,565 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2457 transitions. Word has length 24 [2022-02-15 13:26:40,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:40,565 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2457 transitions. [2022-02-15 13:26:40,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2457 transitions. [2022-02-15 13:26:40,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:40,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:40,580 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:40,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:40,798 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,SelfDestructingSolverStorable45 [2022-02-15 13:26:40,799 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:40,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:40,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1293267325, now seen corresponding path program 31 times [2022-02-15 13:26:40,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:40,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721262317] [2022-02-15 13:26:40,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:40,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:40,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:40,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721262317] [2022-02-15 13:26:40,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721262317] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:40,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212831361] [2022-02-15 13:26:40,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:26:40,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:40,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:40,957 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) [2022-02-15 13:26:40,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-15 13:26:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:40,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:26:40,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:41,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:41,228 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:26:41,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:41,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 23 [2022-02-15 13:26:41,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-15 13:26:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:41,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:41,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:41,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-15 13:26:42,003 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:42,003 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 32 treesize of output 29 [2022-02-15 13:26:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:42,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212831361] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:42,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:42,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:26:42,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290572033] [2022-02-15 13:26:42,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:42,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:26:42,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:42,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:26:42,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:26:42,008 INFO L87 Difference]: Start difference. First operand 780 states and 2457 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:42,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:42,225 INFO L93 Difference]: Finished difference Result 905 states and 2797 transitions. [2022-02-15 13:26:42,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:26:42,225 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:42,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:42,239 INFO L225 Difference]: With dead ends: 905 [2022-02-15 13:26:42,239 INFO L226 Difference]: Without dead ends: 858 [2022-02-15 13:26:42,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:26:42,240 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:42,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 311 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 648 Invalid, 0 Unknown, 339 Unchecked, 0.2s Time] [2022-02-15 13:26:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-02-15 13:26:42,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 790. [2022-02-15 13:26:42,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 3.131812420785805) internal successors, (2471), 789 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2471 transitions. [2022-02-15 13:26:42,250 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2471 transitions. Word has length 24 [2022-02-15 13:26:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:42,250 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 2471 transitions. [2022-02-15 13:26:42,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2471 transitions. [2022-02-15 13:26:42,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:42,251 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:42,251 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:42,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:42,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-02-15 13:26:42,468 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:42,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:42,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1675789759, now seen corresponding path program 32 times [2022-02-15 13:26:42,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:42,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140074242] [2022-02-15 13:26:42,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:42,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:42,635 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:42,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140074242] [2022-02-15 13:26:42,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140074242] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:42,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352666401] [2022-02-15 13:26:42,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:26:42,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:42,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:42,637 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) [2022-02-15 13:26:42,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-15 13:26:42,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:26:42,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:42,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:42,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:42,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:42,823 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:26:42,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:42,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 22 [2022-02-15 13:26:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:42,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:43,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:43,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 72 [2022-02-15 13:26:43,481 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:43,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:26:43,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:43,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352666401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:43,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:43,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:26:43,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601937966] [2022-02-15 13:26:43,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:43,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:26:43,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:43,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:26:43,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:26:43,487 INFO L87 Difference]: Start difference. First operand 790 states and 2471 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:43,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:43,882 INFO L93 Difference]: Finished difference Result 1102 states and 3327 transitions. [2022-02-15 13:26:43,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:26:43,882 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:43,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:43,885 INFO L225 Difference]: With dead ends: 1102 [2022-02-15 13:26:43,885 INFO L226 Difference]: Without dead ends: 1007 [2022-02-15 13:26:43,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:26:43,887 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 131 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:43,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 255 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 536 Invalid, 0 Unknown, 234 Unchecked, 0.2s Time] [2022-02-15 13:26:43,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-02-15 13:26:43,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 789. [2022-02-15 13:26:43,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 3.1142131979695433) internal successors, (2454), 788 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2454 transitions. [2022-02-15 13:26:43,901 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2454 transitions. Word has length 24 [2022-02-15 13:26:43,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:43,901 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 2454 transitions. [2022-02-15 13:26:43,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:43,901 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2454 transitions. [2022-02-15 13:26:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:43,902 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:43,902 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:43,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-02-15 13:26:44,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:44,115 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:44,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:44,116 INFO L85 PathProgramCache]: Analyzing trace with hash -960638089, now seen corresponding path program 33 times [2022-02-15 13:26:44,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:44,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974195828] [2022-02-15 13:26:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:44,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:44,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:44,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:44,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974195828] [2022-02-15 13:26:44,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974195828] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:44,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646257485] [2022-02-15 13:26:44,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:26:44,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:44,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:44,307 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) [2022-02-15 13:26:44,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-15 13:26:44,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:26:44,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:44,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:44,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:44,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:26:44,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:26:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:44,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:44,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:44,951 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 73 treesize of output 66 [2022-02-15 13:26:45,164 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:45,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:26:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:45,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646257485] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:45,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:45,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:26:45,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382523276] [2022-02-15 13:26:45,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:45,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:26:45,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:45,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:26:45,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:26:45,169 INFO L87 Difference]: Start difference. First operand 789 states and 2454 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:45,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:45,508 INFO L93 Difference]: Finished difference Result 990 states and 3054 transitions. [2022-02-15 13:26:45,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:26:45,508 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:45,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:45,510 INFO L225 Difference]: With dead ends: 990 [2022-02-15 13:26:45,510 INFO L226 Difference]: Without dead ends: 959 [2022-02-15 13:26:45,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:26:45,511 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 122 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:45,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 159 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:26:45,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-02-15 13:26:45,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 789. [2022-02-15 13:26:45,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 3.1142131979695433) internal successors, (2454), 788 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2454 transitions. [2022-02-15 13:26:45,522 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2454 transitions. Word has length 24 [2022-02-15 13:26:45,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:45,522 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 2454 transitions. [2022-02-15 13:26:45,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:45,522 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2454 transitions. [2022-02-15 13:26:45,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:45,523 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:45,524 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:45,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-02-15 13:26:45,738 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,SelfDestructingSolverStorable48 [2022-02-15 13:26:45,738 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:45,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:45,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1542398869, now seen corresponding path program 34 times [2022-02-15 13:26:45,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:45,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705490519] [2022-02-15 13:26:45,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:45,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:45,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:45,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:45,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705490519] [2022-02-15 13:26:45,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705490519] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:45,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967314713] [2022-02-15 13:26:45,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:26:45,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:45,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:45,972 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) [2022-02-15 13:26:45,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-15 13:26:46,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:26:46,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:46,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:26:46,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:46,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:46,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:26:46,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:46,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:26:46,436 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:46,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:46,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:46,970 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 102 treesize of output 90 [2022-02-15 13:26:47,153 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:47,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-15 13:26:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:47,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967314713] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:47,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:47,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:26:47,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194718402] [2022-02-15 13:26:47,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:47,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:26:47,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:47,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:26:47,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:26:47,158 INFO L87 Difference]: Start difference. First operand 789 states and 2454 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:48,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:48,358 INFO L93 Difference]: Finished difference Result 1415 states and 4067 transitions. [2022-02-15 13:26:48,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:26:48,358 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:48,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:48,361 INFO L225 Difference]: With dead ends: 1415 [2022-02-15 13:26:48,361 INFO L226 Difference]: Without dead ends: 1211 [2022-02-15 13:26:48,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:26:48,362 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 239 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:48,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 374 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 770 Invalid, 0 Unknown, 204 Unchecked, 0.3s Time] [2022-02-15 13:26:48,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1211 states. [2022-02-15 13:26:48,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1211 to 803. [2022-02-15 13:26:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.1396508728179553) internal successors, (2518), 802 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2518 transitions. [2022-02-15 13:26:48,373 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2518 transitions. Word has length 24 [2022-02-15 13:26:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:48,374 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 2518 transitions. [2022-02-15 13:26:48,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2518 transitions. [2022-02-15 13:26:48,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:48,375 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:48,375 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:48,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:48,591 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,SelfDestructingSolverStorable49 [2022-02-15 13:26:48,592 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:48,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:48,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1657919583, now seen corresponding path program 35 times [2022-02-15 13:26:48,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:48,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856535389] [2022-02-15 13:26:48,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:48,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:48,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:48,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856535389] [2022-02-15 13:26:48,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856535389] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:48,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857080116] [2022-02-15 13:26:48,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:26:48,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:48,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:48,812 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) [2022-02-15 13:26:48,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-15 13:26:48,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:26:48,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:48,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:48,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:48,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:48,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:26:49,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:49,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:26:49,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:49,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:49,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:49,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-15 13:26:49,692 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:49,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:26:49,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:49,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857080116] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:49,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:49,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:26:49,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741050011] [2022-02-15 13:26:49,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:49,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:26:49,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:49,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:26:49,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:26:49,696 INFO L87 Difference]: Start difference. First operand 803 states and 2518 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:49,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:49,836 INFO L93 Difference]: Finished difference Result 966 states and 3004 transitions. [2022-02-15 13:26:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:26:49,836 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:49,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:49,838 INFO L225 Difference]: With dead ends: 966 [2022-02-15 13:26:49,838 INFO L226 Difference]: Without dead ends: 908 [2022-02-15 13:26:49,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:26:49,838 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:49,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 196 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 347 Invalid, 0 Unknown, 126 Unchecked, 0.1s Time] [2022-02-15 13:26:49,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-02-15 13:26:49,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 810. [2022-02-15 13:26:49,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.147095179233622) internal successors, (2546), 809 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:49,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2546 transitions. [2022-02-15 13:26:49,848 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2546 transitions. Word has length 24 [2022-02-15 13:26:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:49,848 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 2546 transitions. [2022-02-15 13:26:49,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:49,849 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2546 transitions. [2022-02-15 13:26:49,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:49,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:49,850 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:49,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-02-15 13:26:50,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:50,063 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:50,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:50,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1088483539, now seen corresponding path program 36 times [2022-02-15 13:26:50,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:50,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541411151] [2022-02-15 13:26:50,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:50,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:50,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:50,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541411151] [2022-02-15 13:26:50,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541411151] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:50,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313692532] [2022-02-15 13:26:50,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:26:50,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:50,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:50,191 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) [2022-02-15 13:26:50,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-15 13:26:50,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:26:50,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:50,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:50,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:50,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:50,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:26:50,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:50,495 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-15 13:26:50,497 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 11 treesize of output 7 [2022-02-15 13:26:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:50,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:50,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:50,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-02-15 13:26:51,100 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:51,100 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 28 treesize of output 25 [2022-02-15 13:26:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:51,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313692532] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:51,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:51,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:26:51,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374232123] [2022-02-15 13:26:51,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:51,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:26:51,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:51,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:26:51,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:26:51,106 INFO L87 Difference]: Start difference. First operand 810 states and 2546 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2022-02-15 13:26:51,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:51,359 INFO L93 Difference]: Finished difference Result 943 states and 2934 transitions. [2022-02-15 13:26:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:26:51,360 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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 24 [2022-02-15 13:26:51,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:51,361 INFO L225 Difference]: With dead ends: 943 [2022-02-15 13:26:51,361 INFO L226 Difference]: Without dead ends: 897 [2022-02-15 13:26:51,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:26:51,367 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 89 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 456 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:51,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 271 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 418 Invalid, 0 Unknown, 456 Unchecked, 0.1s Time] [2022-02-15 13:26:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-02-15 13:26:51,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 832. [2022-02-15 13:26:51,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.1287605294825513) internal successors, (2600), 831 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:51,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2600 transitions. [2022-02-15 13:26:51,397 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2600 transitions. Word has length 24 [2022-02-15 13:26:51,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:51,397 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 2600 transitions. [2022-02-15 13:26:51,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 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) [2022-02-15 13:26:51,397 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2600 transitions. [2022-02-15 13:26:51,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:51,399 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:51,399 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:51,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:51,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:51,617 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:51,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:51,618 INFO L85 PathProgramCache]: Analyzing trace with hash 413101611, now seen corresponding path program 37 times [2022-02-15 13:26:51,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:51,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885575209] [2022-02-15 13:26:51,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:51,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:51,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:51,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885575209] [2022-02-15 13:26:51,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885575209] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:51,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222390303] [2022-02-15 13:26:51,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:26:51,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:51,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:51,826 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) [2022-02-15 13:26:51,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-15 13:26:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:51,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:51,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:52,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:52,020 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:26:52,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:52,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:26:52,259 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 22 treesize of output 14 [2022-02-15 13:26:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:52,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:52,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:52,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:26:53,180 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:53,180 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 28 treesize of output 25 [2022-02-15 13:26:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:53,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222390303] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:53,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:53,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:26:53,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535864071] [2022-02-15 13:26:53,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:53,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:26:53,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:53,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:26:53,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:26:53,186 INFO L87 Difference]: Start difference. First operand 832 states and 2600 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:53,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:53,344 INFO L93 Difference]: Finished difference Result 903 states and 2790 transitions. [2022-02-15 13:26:53,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:26:53,345 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:53,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:53,346 INFO L225 Difference]: With dead ends: 903 [2022-02-15 13:26:53,346 INFO L226 Difference]: Without dead ends: 900 [2022-02-15 13:26:53,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:26:53,347 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 36 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:53,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 230 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 378 Invalid, 0 Unknown, 241 Unchecked, 0.2s Time] [2022-02-15 13:26:53,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-02-15 13:26:53,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 834. [2022-02-15 13:26:53,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 3.1236494597839135) internal successors, (2602), 833 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:53,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2602 transitions. [2022-02-15 13:26:53,356 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2602 transitions. Word has length 24 [2022-02-15 13:26:53,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:53,357 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 2602 transitions. [2022-02-15 13:26:53,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:53,357 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2602 transitions. [2022-02-15 13:26:53,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:53,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:53,358 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:53,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:53,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:53,575 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:53,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1621087565, now seen corresponding path program 38 times [2022-02-15 13:26:53,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:53,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785348712] [2022-02-15 13:26:53,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:53,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:53,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:53,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785348712] [2022-02-15 13:26:53,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785348712] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:53,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428589278] [2022-02-15 13:26:53,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:26:53,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:53,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:53,780 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) [2022-02-15 13:26:53,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-15 13:26:53,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:26:53,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:53,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:53,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:53,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:53,968 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:26:54,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:54,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 23 [2022-02-15 13:26:54,183 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 22 treesize of output 14 [2022-02-15 13:26:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:54,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:54,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:54,883 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 141 treesize of output 121 [2022-02-15 13:26:55,064 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:55,065 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 28 treesize of output 25 [2022-02-15 13:26:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:55,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428589278] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:55,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:55,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:26:55,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838508819] [2022-02-15 13:26:55,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:55,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:26:55,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:55,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:26:55,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:26:55,069 INFO L87 Difference]: Start difference. First operand 834 states and 2602 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:55,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:55,217 INFO L93 Difference]: Finished difference Result 910 states and 2805 transitions. [2022-02-15 13:26:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:26:55,217 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:55,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:55,218 INFO L225 Difference]: With dead ends: 910 [2022-02-15 13:26:55,218 INFO L226 Difference]: Without dead ends: 903 [2022-02-15 13:26:55,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:26:55,219 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 29 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:55,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 271 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 426 Invalid, 0 Unknown, 200 Unchecked, 0.1s Time] [2022-02-15 13:26:55,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-02-15 13:26:55,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 842. [2022-02-15 13:26:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 3.1105826397146252) internal successors, (2616), 841 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:55,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 2616 transitions. [2022-02-15 13:26:55,228 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 2616 transitions. Word has length 24 [2022-02-15 13:26:55,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:55,228 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 2616 transitions. [2022-02-15 13:26:55,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:55,228 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 2616 transitions. [2022-02-15 13:26:55,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:55,230 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:55,230 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:55,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:55,446 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,SelfDestructingSolverStorable53 [2022-02-15 13:26:55,446 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:55,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:55,446 INFO L85 PathProgramCache]: Analyzing trace with hash 76722125, now seen corresponding path program 39 times [2022-02-15 13:26:55,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:55,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572414666] [2022-02-15 13:26:55,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:55,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:55,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:55,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572414666] [2022-02-15 13:26:55,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572414666] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:55,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58577511] [2022-02-15 13:26:55,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:26:55,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:55,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:55,656 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) [2022-02-15 13:26:55,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-15 13:26:55,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:26:55,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:55,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:55,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:55,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:55,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:26:56,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:56,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 23 [2022-02-15 13:26:56,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-15 13:26:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:56,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:56,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:56,801 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 141 treesize of output 121 [2022-02-15 13:26:56,997 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:56,998 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 28 treesize of output 25 [2022-02-15 13:26:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:57,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58577511] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:57,003 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:57,003 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:26:57,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568515176] [2022-02-15 13:26:57,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:57,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:26:57,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:57,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:26:57,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:26:57,004 INFO L87 Difference]: Start difference. First operand 842 states and 2616 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:57,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:57,191 INFO L93 Difference]: Finished difference Result 906 states and 2797 transitions. [2022-02-15 13:26:57,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:26:57,192 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:57,193 INFO L225 Difference]: With dead ends: 906 [2022-02-15 13:26:57,193 INFO L226 Difference]: Without dead ends: 903 [2022-02-15 13:26:57,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:26:57,194 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 27 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:57,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 240 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 412 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-02-15 13:26:57,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-02-15 13:26:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 840. [2022-02-15 13:26:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.113230035756853) internal successors, (2612), 839 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:57,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2612 transitions. [2022-02-15 13:26:57,203 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2612 transitions. Word has length 24 [2022-02-15 13:26:57,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:57,203 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 2612 transitions. [2022-02-15 13:26:57,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:57,204 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2612 transitions. [2022-02-15 13:26:57,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:57,205 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:57,205 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:57,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:57,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-02-15 13:26:57,421 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:57,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:57,422 INFO L85 PathProgramCache]: Analyzing trace with hash 945705637, now seen corresponding path program 40 times [2022-02-15 13:26:57,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:57,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604142183] [2022-02-15 13:26:57,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:57,422 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:57,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:57,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604142183] [2022-02-15 13:26:57,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604142183] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:57,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781605272] [2022-02-15 13:26:57,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:26:57,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:57,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:57,642 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) [2022-02-15 13:26:57,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-15 13:26:57,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:26:57,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:57,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:57,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:57,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:57,832 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:26:57,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:57,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:26:57,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-15 13:26:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:58,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:26:58,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:26:58,517 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 141 treesize of output 121 [2022-02-15 13:26:58,773 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:26:58,773 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 28 treesize of output 25 [2022-02-15 13:26:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:26:58,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781605272] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:26:58,779 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:26:58,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:26:58,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976275591] [2022-02-15 13:26:58,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:26:58,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:26:58,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:26:58,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:26:58,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:26:58,779 INFO L87 Difference]: Start difference. First operand 840 states and 2612 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:58,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:26:58,932 INFO L93 Difference]: Finished difference Result 907 states and 2798 transitions. [2022-02-15 13:26:58,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:26:58,932 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:26:58,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:26:58,934 INFO L225 Difference]: With dead ends: 907 [2022-02-15 13:26:58,934 INFO L226 Difference]: Without dead ends: 904 [2022-02-15 13:26:58,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:26:58,934 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:26:58,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 199 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 302 Invalid, 0 Unknown, 170 Unchecked, 0.1s Time] [2022-02-15 13:26:58,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-02-15 13:26:58,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 838. [2022-02-15 13:26:58,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.115890083632019) internal successors, (2608), 837 states have internal predecessors, (2608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:58,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2608 transitions. [2022-02-15 13:26:58,944 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2608 transitions. Word has length 24 [2022-02-15 13:26:58,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:26:58,944 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 2608 transitions. [2022-02-15 13:26:58,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:26:58,944 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2608 transitions. [2022-02-15 13:26:58,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:26:58,945 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:26:58,945 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:26:58,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-15 13:26:59,161 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,SelfDestructingSolverStorable55 [2022-02-15 13:26:59,161 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:26:59,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:26:59,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1471867155, now seen corresponding path program 41 times [2022-02-15 13:26:59,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:26:59,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56142583] [2022-02-15 13:26:59,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:26:59,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:26:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:26:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:59,440 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:26:59,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56142583] [2022-02-15 13:26:59,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56142583] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:26:59,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135051576] [2022-02-15 13:26:59,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:26:59,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:26:59,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:26:59,442 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) [2022-02-15 13:26:59,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-15 13:26:59,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:26:59,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:26:59,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:26:59,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:26:59,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:59,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:26:59,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:26:59,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:26:59,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-15 13:26:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:26:59,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:00,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:00,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:27:00,735 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:00,735 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 28 treesize of output 25 [2022-02-15 13:27:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:27:00,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135051576] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:00,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:00,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:27:00,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650634933] [2022-02-15 13:27:00,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:00,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:27:00,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:27:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:27:00,741 INFO L87 Difference]: Start difference. First operand 838 states and 2608 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:00,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:00,882 INFO L93 Difference]: Finished difference Result 955 states and 2926 transitions. [2022-02-15 13:27:00,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:27:00,882 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:00,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:00,884 INFO L225 Difference]: With dead ends: 955 [2022-02-15 13:27:00,884 INFO L226 Difference]: Without dead ends: 940 [2022-02-15 13:27:00,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:27:00,884 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:00,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 283 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 327 Invalid, 0 Unknown, 234 Unchecked, 0.1s Time] [2022-02-15 13:27:00,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-02-15 13:27:00,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 864. [2022-02-15 13:27:00,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.090382387022016) internal successors, (2667), 863 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:00,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2667 transitions. [2022-02-15 13:27:00,895 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2667 transitions. Word has length 24 [2022-02-15 13:27:00,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:00,895 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 2667 transitions. [2022-02-15 13:27:00,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:00,895 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2667 transitions. [2022-02-15 13:27:00,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:00,896 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:00,896 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:00,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:01,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-02-15 13:27:01,112 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:01,113 INFO L85 PathProgramCache]: Analyzing trace with hash 927346221, now seen corresponding path program 42 times [2022-02-15 13:27:01,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:01,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576061992] [2022-02-15 13:27:01,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:01,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:01,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:27:01,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:01,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576061992] [2022-02-15 13:27:01,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576061992] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:01,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679426064] [2022-02-15 13:27:01,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:27:01,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:01,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:01,378 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) [2022-02-15 13:27:01,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-15 13:27:01,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:27:01,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:01,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:01,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:01,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:01,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:27:01,753 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 29 treesize of output 23 [2022-02-15 13:27:01,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:01,755 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-02-15 13:27:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:27:01,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:02,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:02,302 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 141 treesize of output 121 [2022-02-15 13:27:02,420 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:02,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:27:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:27:02,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679426064] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:02,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:02,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:27:02,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510625453] [2022-02-15 13:27:02,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:02,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:27:02,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:02,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:27:02,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:27:02,425 INFO L87 Difference]: Start difference. First operand 864 states and 2667 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:02,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:02,547 INFO L93 Difference]: Finished difference Result 936 states and 2868 transitions. [2022-02-15 13:27:02,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:27:02,547 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:02,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:02,548 INFO L225 Difference]: With dead ends: 936 [2022-02-15 13:27:02,548 INFO L226 Difference]: Without dead ends: 927 [2022-02-15 13:27:02,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:27:02,549 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 49 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 259 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:02,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 254 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 340 Invalid, 0 Unknown, 259 Unchecked, 0.1s Time] [2022-02-15 13:27:02,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-02-15 13:27:02,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 868. [2022-02-15 13:27:02,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.0876585928489044) internal successors, (2677), 867 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:02,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2677 transitions. [2022-02-15 13:27:02,559 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2677 transitions. Word has length 24 [2022-02-15 13:27:02,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:02,559 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 2677 transitions. [2022-02-15 13:27:02,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:02,559 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2677 transitions. [2022-02-15 13:27:02,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:02,560 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:02,560 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:02,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:02,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:02,779 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:02,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:02,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1641018645, now seen corresponding path program 43 times [2022-02-15 13:27:02,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:02,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622782080] [2022-02-15 13:27:02,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:02,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:27:02,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:02,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622782080] [2022-02-15 13:27:02,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622782080] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:02,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72522802] [2022-02-15 13:27:02,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:27:02,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:02,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:02,976 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) [2022-02-15 13:27:03,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-15 13:27:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:03,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:03,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:03,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:03,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:27:03,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:03,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:27:03,329 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 22 treesize of output 14 [2022-02-15 13:27:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:27:03,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:03,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:03,921 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 141 treesize of output 121 [2022-02-15 13:27:04,046 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:04,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:27:04,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:27:04,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72522802] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:04,050 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:04,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:27:04,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359137114] [2022-02-15 13:27:04,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:04,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:27:04,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:04,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:27:04,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:27:04,051 INFO L87 Difference]: Start difference. First operand 868 states and 2677 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:04,178 INFO L93 Difference]: Finished difference Result 935 states and 2867 transitions. [2022-02-15 13:27:04,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:27:04,178 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:04,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:04,180 INFO L225 Difference]: With dead ends: 935 [2022-02-15 13:27:04,180 INFO L226 Difference]: Without dead ends: 932 [2022-02-15 13:27:04,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:27:04,180 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:04,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 194 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 366 Invalid, 0 Unknown, 117 Unchecked, 0.1s Time] [2022-02-15 13:27:04,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-02-15 13:27:04,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 864. [2022-02-15 13:27:04,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 3.090382387022016) internal successors, (2667), 863 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:04,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2667 transitions. [2022-02-15 13:27:04,190 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2667 transitions. Word has length 24 [2022-02-15 13:27:04,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:04,190 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 2667 transitions. [2022-02-15 13:27:04,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:04,190 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2667 transitions. [2022-02-15 13:27:04,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:04,191 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:04,191 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:04,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-02-15 13:27:04,407 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,SelfDestructingSolverStorable58 [2022-02-15 13:27:04,407 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:04,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:04,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2013596297, now seen corresponding path program 44 times [2022-02-15 13:27:04,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:04,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051943548] [2022-02-15 13:27:04,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:04,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:04,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:27:04,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:04,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051943548] [2022-02-15 13:27:04,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051943548] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:04,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155626016] [2022-02-15 13:27:04,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:27:04,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:04,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:04,634 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) [2022-02-15 13:27:04,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-15 13:27:04,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:27:04,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:04,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:04,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:04,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:04,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:27:04,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:04,909 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:27:04,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-15 13:27:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:27:04,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:05,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:05,312 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 141 treesize of output 121 [2022-02-15 13:27:05,432 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:05,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:27:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:27:05,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155626016] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:05,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:05,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:27:05,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761650557] [2022-02-15 13:27:05,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:05,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:27:05,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:05,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:27:05,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:27:05,436 INFO L87 Difference]: Start difference. First operand 864 states and 2667 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:05,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:05,592 INFO L93 Difference]: Finished difference Result 996 states and 3049 transitions. [2022-02-15 13:27:05,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:27:05,592 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:05,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:05,594 INFO L225 Difference]: With dead ends: 996 [2022-02-15 13:27:05,594 INFO L226 Difference]: Without dead ends: 969 [2022-02-15 13:27:05,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:27:05,594 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 612 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:05,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 246 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 364 Invalid, 0 Unknown, 612 Unchecked, 0.1s Time] [2022-02-15 13:27:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-02-15 13:27:05,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 832. [2022-02-15 13:27:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 831 states have (on average 3.1287605294825513) internal successors, (2600), 831 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 2600 transitions. [2022-02-15 13:27:05,604 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 2600 transitions. Word has length 24 [2022-02-15 13:27:05,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:05,604 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 2600 transitions. [2022-02-15 13:27:05,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:05,604 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 2600 transitions. [2022-02-15 13:27:05,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:05,605 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:05,605 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:05,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:05,821 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,SelfDestructingSolverStorable59 [2022-02-15 13:27:05,821 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:05,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:05,822 INFO L85 PathProgramCache]: Analyzing trace with hash 604080769, now seen corresponding path program 45 times [2022-02-15 13:27:05,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:05,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766680499] [2022-02-15 13:27:05,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:05,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:05,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:05,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766680499] [2022-02-15 13:27:05,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766680499] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:05,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606323663] [2022-02-15 13:27:05,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:27:05,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:05,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:05,968 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) [2022-02-15 13:27:05,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-15 13:27:06,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:27:06,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:06,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:06,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:06,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:06,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:27:06,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:06,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 37 [2022-02-15 13:27:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:06,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:06,601 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:06,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:27:06,790 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:06,790 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 28 treesize of output 25 [2022-02-15 13:27:06,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:06,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606323663] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:06,795 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:06,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:27:06,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359786459] [2022-02-15 13:27:06,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:06,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:27:06,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:06,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:27:06,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:27:06,796 INFO L87 Difference]: Start difference. First operand 832 states and 2600 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:07,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:07,047 INFO L93 Difference]: Finished difference Result 950 states and 2925 transitions. [2022-02-15 13:27:07,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:27:07,047 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:07,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:07,048 INFO L225 Difference]: With dead ends: 950 [2022-02-15 13:27:07,048 INFO L226 Difference]: Without dead ends: 915 [2022-02-15 13:27:07,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:27:07,049 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:07,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 253 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 593 Invalid, 0 Unknown, 138 Unchecked, 0.2s Time] [2022-02-15 13:27:07,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2022-02-15 13:27:07,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 834. [2022-02-15 13:27:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 3.127250900360144) internal successors, (2605), 833 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2605 transitions. [2022-02-15 13:27:07,061 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2605 transitions. Word has length 24 [2022-02-15 13:27:07,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:07,061 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 2605 transitions. [2022-02-15 13:27:07,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:07,061 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2605 transitions. [2022-02-15 13:27:07,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:07,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:07,063 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:07,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:07,279 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,SelfDestructingSolverStorable60 [2022-02-15 13:27:07,279 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:07,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:07,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1293090955, now seen corresponding path program 46 times [2022-02-15 13:27:07,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:07,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178208561] [2022-02-15 13:27:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:07,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:07,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:07,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178208561] [2022-02-15 13:27:07,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178208561] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:07,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013423705] [2022-02-15 13:27:07,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:27:07,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:07,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:07,466 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) [2022-02-15 13:27:07,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-15 13:27:07,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:27:07,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:07,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:07,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:07,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:07,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:27:07,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:07,778 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:27:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:07,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:08,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:08,326 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 141 treesize of output 121 [2022-02-15 13:27:08,535 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:08,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:27:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:08,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013423705] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:08,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:08,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:27:08,546 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580442816] [2022-02-15 13:27:08,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:08,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:27:08,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:08,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:27:08,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:27:08,547 INFO L87 Difference]: Start difference. First operand 834 states and 2605 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:08,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:08,786 INFO L93 Difference]: Finished difference Result 960 states and 2975 transitions. [2022-02-15 13:27:08,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:27:08,786 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:08,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:08,787 INFO L225 Difference]: With dead ends: 960 [2022-02-15 13:27:08,788 INFO L226 Difference]: Without dead ends: 929 [2022-02-15 13:27:08,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:27:08,788 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 70 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:08,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 273 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 576 Invalid, 0 Unknown, 423 Unchecked, 0.2s Time] [2022-02-15 13:27:08,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-02-15 13:27:08,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 836. [2022-02-15 13:27:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.125748502994012) internal successors, (2610), 835 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:08,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2610 transitions. [2022-02-15 13:27:08,798 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2610 transitions. Word has length 24 [2022-02-15 13:27:08,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:08,798 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 2610 transitions. [2022-02-15 13:27:08,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:08,798 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2610 transitions. [2022-02-15 13:27:08,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:08,799 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:08,799 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:08,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:09,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:09,015 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:09,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:09,016 INFO L85 PathProgramCache]: Analyzing trace with hash -439998855, now seen corresponding path program 47 times [2022-02-15 13:27:09,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:09,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839458679] [2022-02-15 13:27:09,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:09,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:09,212 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:09,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839458679] [2022-02-15 13:27:09,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839458679] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:09,212 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310037941] [2022-02-15 13:27:09,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:27:09,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:09,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:09,214 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) [2022-02-15 13:27:09,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-15 13:27:09,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:27:09,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:09,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:09,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:09,377 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 41 treesize of output 35 [2022-02-15 13:27:09,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:27:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:09,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:10,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:10,025 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:27:10,244 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:10,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:27:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:10,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310037941] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:10,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:10,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:27:10,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109304167] [2022-02-15 13:27:10,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:10,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:27:10,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:10,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:27:10,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:27:10,249 INFO L87 Difference]: Start difference. First operand 836 states and 2610 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:11,270 INFO L93 Difference]: Finished difference Result 1146 states and 3470 transitions. [2022-02-15 13:27:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:27:11,270 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:11,272 INFO L225 Difference]: With dead ends: 1146 [2022-02-15 13:27:11,272 INFO L226 Difference]: Without dead ends: 1057 [2022-02-15 13:27:11,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=217, Invalid=1115, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:27:11,273 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 126 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:11,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 305 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:27:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-02-15 13:27:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 866. [2022-02-15 13:27:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.128323699421965) internal successors, (2706), 865 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:11,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2706 transitions. [2022-02-15 13:27:11,284 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2706 transitions. Word has length 24 [2022-02-15 13:27:11,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:11,285 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 2706 transitions. [2022-02-15 13:27:11,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:11,285 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2706 transitions. [2022-02-15 13:27:11,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:11,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:11,286 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:11,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:11,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:11,490 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:11,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:11,490 INFO L85 PathProgramCache]: Analyzing trace with hash 723934319, now seen corresponding path program 48 times [2022-02-15 13:27:11,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:11,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063961897] [2022-02-15 13:27:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:11,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:11,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:11,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063961897] [2022-02-15 13:27:11,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063961897] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:11,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141043544] [2022-02-15 13:27:11,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:27:11,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:11,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:11,661 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) [2022-02-15 13:27:11,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-15 13:27:11,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:27:11,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:11,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:11,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:11,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:11,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:27:11,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:11,878 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:27:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:11,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:12,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:12,306 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 141 treesize of output 121 [2022-02-15 13:27:12,414 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:12,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:27:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:12,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141043544] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:12,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:12,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:27:12,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932549376] [2022-02-15 13:27:12,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:12,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:27:12,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:12,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:27:12,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:27:12,422 INFO L87 Difference]: Start difference. First operand 866 states and 2706 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:12,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:12,534 INFO L93 Difference]: Finished difference Result 978 states and 3037 transitions. [2022-02-15 13:27:12,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:27:12,535 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:12,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:12,536 INFO L225 Difference]: With dead ends: 978 [2022-02-15 13:27:12,536 INFO L226 Difference]: Without dead ends: 943 [2022-02-15 13:27:12,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:27:12,537 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:12,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 239 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 375 Invalid, 0 Unknown, 178 Unchecked, 0.1s Time] [2022-02-15 13:27:12,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-02-15 13:27:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 869. [2022-02-15 13:27:12,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 3.129032258064516) internal successors, (2716), 868 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:12,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2716 transitions. [2022-02-15 13:27:12,549 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2716 transitions. Word has length 24 [2022-02-15 13:27:12,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:12,549 INFO L470 AbstractCegarLoop]: Abstraction has 869 states and 2716 transitions. [2022-02-15 13:27:12,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:12,550 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2716 transitions. [2022-02-15 13:27:12,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:12,551 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:12,551 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:12,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:12,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:12,767 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:12,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:12,767 INFO L85 PathProgramCache]: Analyzing trace with hash -350679239, now seen corresponding path program 49 times [2022-02-15 13:27:12,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:12,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973760542] [2022-02-15 13:27:12,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:12,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:12,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:12,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973760542] [2022-02-15 13:27:12,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973760542] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:12,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156397861] [2022-02-15 13:27:12,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:27:12,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:12,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:12,969 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) [2022-02-15 13:27:13,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-15 13:27:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:13,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:13,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:13,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:13,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:27:13,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:13,399 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:27:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:13,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:14,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:14,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:27:14,457 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:14,457 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 28 treesize of output 25 [2022-02-15 13:27:14,462 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:14,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156397861] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:14,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:14,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:27:14,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298144630] [2022-02-15 13:27:14,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:14,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:27:14,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:14,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:27:14,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:27:14,463 INFO L87 Difference]: Start difference. First operand 869 states and 2716 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) [2022-02-15 13:27:14,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:14,660 INFO L93 Difference]: Finished difference Result 974 states and 3033 transitions. [2022-02-15 13:27:14,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:27:14,661 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 24 [2022-02-15 13:27:14,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:14,662 INFO L225 Difference]: With dead ends: 974 [2022-02-15 13:27:14,662 INFO L226 Difference]: Without dead ends: 943 [2022-02-15 13:27:14,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:27:14,663 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:14,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 199 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 434 Invalid, 0 Unknown, 149 Unchecked, 0.2s Time] [2022-02-15 13:27:14,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-02-15 13:27:14,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 876. [2022-02-15 13:27:14,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 3.136) internal successors, (2744), 875 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2744 transitions. [2022-02-15 13:27:14,673 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2744 transitions. Word has length 24 [2022-02-15 13:27:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:14,673 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 2744 transitions. [2022-02-15 13:27:14,673 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) [2022-02-15 13:27:14,673 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2744 transitions. [2022-02-15 13:27:14,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:14,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:14,674 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:14,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-02-15 13:27:14,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-02-15 13:27:14,875 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:14,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:14,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1007607403, now seen corresponding path program 50 times [2022-02-15 13:27:14,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:14,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46896341] [2022-02-15 13:27:14,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:14,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:15,063 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:15,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:15,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46896341] [2022-02-15 13:27:15,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46896341] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:15,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111806922] [2022-02-15 13:27:15,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:27:15,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:15,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:15,065 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) [2022-02-15 13:27:15,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-15 13:27:15,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:27:15,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:15,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:15,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:15,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:15,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:27:15,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:15,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:27:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:15,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:15,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:15,931 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 72 treesize of output 65 [2022-02-15 13:27:16,055 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:16,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:27:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:16,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111806922] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:16,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:16,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:27:16,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821328512] [2022-02-15 13:27:16,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:16,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:27:16,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:16,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:27:16,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:27:16,060 INFO L87 Difference]: Start difference. First operand 876 states and 2744 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:17,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:17,204 INFO L93 Difference]: Finished difference Result 1484 states and 4349 transitions. [2022-02-15 13:27:17,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:27:17,204 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:17,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:17,206 INFO L225 Difference]: With dead ends: 1484 [2022-02-15 13:27:17,206 INFO L226 Difference]: Without dead ends: 1267 [2022-02-15 13:27:17,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:27:17,207 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 220 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:17,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 356 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 800 Invalid, 0 Unknown, 218 Unchecked, 0.4s Time] [2022-02-15 13:27:17,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-02-15 13:27:17,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 905. [2022-02-15 13:27:17,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 3.1670353982300883) internal successors, (2863), 904 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:17,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2863 transitions. [2022-02-15 13:27:17,221 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2863 transitions. Word has length 24 [2022-02-15 13:27:17,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:17,221 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 2863 transitions. [2022-02-15 13:27:17,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:17,221 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2863 transitions. [2022-02-15 13:27:17,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:17,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:17,225 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:17,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:17,439 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,SelfDestructingSolverStorable65 [2022-02-15 13:27:17,440 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:17,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:17,440 INFO L85 PathProgramCache]: Analyzing trace with hash -863130261, now seen corresponding path program 51 times [2022-02-15 13:27:17,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:17,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300920505] [2022-02-15 13:27:17,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:17,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:27:17,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:17,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300920505] [2022-02-15 13:27:17,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300920505] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:17,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080863607] [2022-02-15 13:27:17,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:27:17,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:17,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:17,661 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) [2022-02-15 13:27:17,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-15 13:27:17,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:27:17,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:17,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:27:17,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:17,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:17,896 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:27:17,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:17,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 41 [2022-02-15 13:27:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:27:18,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:18,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:18,837 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 110 treesize of output 98 [2022-02-15 13:27:18,995 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:18,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-15 13:27:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:27:18,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080863607] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:18,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:18,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:27:18,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324312057] [2022-02-15 13:27:19,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:19,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:27:19,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:19,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:27:19,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:27:19,000 INFO L87 Difference]: Start difference. First operand 905 states and 2863 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:19,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:19,881 INFO L93 Difference]: Finished difference Result 1525 states and 4493 transitions. [2022-02-15 13:27:19,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:27:19,881 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:19,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:19,884 INFO L225 Difference]: With dead ends: 1525 [2022-02-15 13:27:19,884 INFO L226 Difference]: Without dead ends: 1340 [2022-02-15 13:27:19,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:27:19,884 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 179 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 341 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:19,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 304 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 758 Invalid, 0 Unknown, 341 Unchecked, 0.3s Time] [2022-02-15 13:27:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2022-02-15 13:27:19,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 930. [2022-02-15 13:27:19,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 3.1980624327233587) internal successors, (2971), 929 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:19,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 2971 transitions. [2022-02-15 13:27:19,898 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 2971 transitions. Word has length 24 [2022-02-15 13:27:19,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:19,898 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 2971 transitions. [2022-02-15 13:27:19,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:19,898 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 2971 transitions. [2022-02-15 13:27:19,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:19,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:19,900 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:19,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:20,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-02-15 13:27:20,108 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:20,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:20,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1870339991, now seen corresponding path program 52 times [2022-02-15 13:27:20,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:20,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354660106] [2022-02-15 13:27:20,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:20,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:27:20,279 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:20,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354660106] [2022-02-15 13:27:20,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354660106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:20,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177648689] [2022-02-15 13:27:20,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:27:20,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:20,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:20,280 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) [2022-02-15 13:27:20,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-15 13:27:20,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:27:20,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:20,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:27:20,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:20,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:20,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:27:20,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:20,469 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:27:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:27:20,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:21,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:21,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-02-15 13:27:21,477 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:21,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-15 13:27:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:27:21,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177648689] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:21,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:21,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:27:21,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607542993] [2022-02-15 13:27:21,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:21,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:27:21,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:21,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:27:21,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:27:21,483 INFO L87 Difference]: Start difference. First operand 930 states and 2971 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:23,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:23,256 INFO L93 Difference]: Finished difference Result 1553 states and 4493 transitions. [2022-02-15 13:27:23,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 13:27:23,257 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:23,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:23,259 INFO L225 Difference]: With dead ends: 1553 [2022-02-15 13:27:23,259 INFO L226 Difference]: Without dead ends: 1434 [2022-02-15 13:27:23,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 13:27:23,260 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 233 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:23,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 533 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1086 Invalid, 0 Unknown, 264 Unchecked, 0.5s Time] [2022-02-15 13:27:23,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2022-02-15 13:27:23,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 947. [2022-02-15 13:27:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 3.214587737843552) internal successors, (3041), 946 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:23,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 3041 transitions. [2022-02-15 13:27:23,274 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 3041 transitions. Word has length 24 [2022-02-15 13:27:23,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:23,274 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 3041 transitions. [2022-02-15 13:27:23,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:23,274 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 3041 transitions. [2022-02-15 13:27:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:23,276 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:23,276 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:23,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:23,494 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,SelfDestructingSolverStorable67 [2022-02-15 13:27:23,494 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:23,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:23,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1796429725, now seen corresponding path program 53 times [2022-02-15 13:27:23,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:23,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568229480] [2022-02-15 13:27:23,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:23,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:23,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:23,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:23,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568229480] [2022-02-15 13:27:23,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568229480] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:23,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692305047] [2022-02-15 13:27:23,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:27:23,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:23,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:23,655 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) [2022-02-15 13:27:23,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-15 13:27:23,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:27:23,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:23,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:23,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:23,790 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 26 treesize of output 20 [2022-02-15 13:27:23,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:27:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:24,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:24,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:24,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-02-15 13:27:24,635 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:24,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:27:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:24,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692305047] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:24,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:24,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:27:24,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367404097] [2022-02-15 13:27:24,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:24,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:27:24,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:24,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:27:24,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:27:24,639 INFO L87 Difference]: Start difference. First operand 947 states and 3041 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:25,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:25,138 INFO L93 Difference]: Finished difference Result 1151 states and 3610 transitions. [2022-02-15 13:27:25,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:27:25,138 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:25,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:25,140 INFO L225 Difference]: With dead ends: 1151 [2022-02-15 13:27:25,140 INFO L226 Difference]: Without dead ends: 1068 [2022-02-15 13:27:25,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:27:25,140 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 96 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:25,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 257 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:27:25,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-02-15 13:27:25,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 958. [2022-02-15 13:27:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 3.2131661442006267) internal successors, (3075), 957 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3075 transitions. [2022-02-15 13:27:25,152 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3075 transitions. Word has length 24 [2022-02-15 13:27:25,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:25,152 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 3075 transitions. [2022-02-15 13:27:25,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3075 transitions. [2022-02-15 13:27:25,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:25,154 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:25,154 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:25,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:25,369 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,SelfDestructingSolverStorable68 [2022-02-15 13:27:25,370 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:25,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:25,370 INFO L85 PathProgramCache]: Analyzing trace with hash 54595079, now seen corresponding path program 54 times [2022-02-15 13:27:25,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:25,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239804162] [2022-02-15 13:27:25,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:25,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:25,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:25,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239804162] [2022-02-15 13:27:25,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239804162] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:25,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986806786] [2022-02-15 13:27:25,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:27:25,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:25,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:25,565 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) [2022-02-15 13:27:25,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-15 13:27:25,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:27:25,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:25,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:25,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:25,711 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 26 treesize of output 20 [2022-02-15 13:27:25,799 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 30 treesize of output 24 [2022-02-15 13:27:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:25,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:26,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:26,528 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 141 treesize of output 121 [2022-02-15 13:27:26,724 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:26,724 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 28 treesize of output 25 [2022-02-15 13:27:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:26,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986806786] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:26,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:26,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:27:26,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137489875] [2022-02-15 13:27:26,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:26,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:27:26,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:26,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:27:26,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:27:26,729 INFO L87 Difference]: Start difference. First operand 958 states and 3075 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:27,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:27,270 INFO L93 Difference]: Finished difference Result 1207 states and 3740 transitions. [2022-02-15 13:27:27,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:27:27,270 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:27,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:27,272 INFO L225 Difference]: With dead ends: 1207 [2022-02-15 13:27:27,272 INFO L226 Difference]: Without dead ends: 1117 [2022-02-15 13:27:27,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:27:27,274 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 118 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:27,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 233 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:27:27,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-02-15 13:27:27,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 973. [2022-02-15 13:27:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 972 states have (on average 3.2088477366255144) internal successors, (3119), 972 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:27,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 3119 transitions. [2022-02-15 13:27:27,308 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 3119 transitions. Word has length 24 [2022-02-15 13:27:27,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:27,308 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 3119 transitions. [2022-02-15 13:27:27,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:27,308 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 3119 transitions. [2022-02-15 13:27:27,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:27,310 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:27,310 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:27,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:27,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-15 13:27:27,513 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:27,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:27,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1571040017, now seen corresponding path program 55 times [2022-02-15 13:27:27,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:27,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879528501] [2022-02-15 13:27:27,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:27,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:27,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:27,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879528501] [2022-02-15 13:27:27,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879528501] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:27,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2577513] [2022-02-15 13:27:27,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:27:27,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:27,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:27,661 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) [2022-02-15 13:27:27,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-15 13:27:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:27,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:27:27,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:27,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:27,919 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:27:27,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:27,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:27:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:28,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:28,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:28,452 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 110 treesize of output 98 [2022-02-15 13:27:28,770 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:28,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-15 13:27:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:28,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2577513] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:28,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:28,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:27:28,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687063174] [2022-02-15 13:27:28,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:28,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:27:28,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:28,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:27:28,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:27:28,776 INFO L87 Difference]: Start difference. First operand 973 states and 3119 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:29,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:29,560 INFO L93 Difference]: Finished difference Result 1352 states and 4140 transitions. [2022-02-15 13:27:29,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:27:29,560 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:29,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:29,562 INFO L225 Difference]: With dead ends: 1352 [2022-02-15 13:27:29,562 INFO L226 Difference]: Without dead ends: 1199 [2022-02-15 13:27:29,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:27:29,563 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 141 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:29,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 273 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 646 Invalid, 0 Unknown, 33 Unchecked, 0.3s Time] [2022-02-15 13:27:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-02-15 13:27:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 987. [2022-02-15 13:27:29,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 3.212981744421907) internal successors, (3168), 986 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:29,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 3168 transitions. [2022-02-15 13:27:29,576 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 3168 transitions. Word has length 24 [2022-02-15 13:27:29,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:29,576 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 3168 transitions. [2022-02-15 13:27:29,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:29,576 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 3168 transitions. [2022-02-15 13:27:29,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:29,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:29,577 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:29,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:29,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:29,794 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:29,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:29,794 INFO L85 PathProgramCache]: Analyzing trace with hash -984124415, now seen corresponding path program 56 times [2022-02-15 13:27:29,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:29,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044927660] [2022-02-15 13:27:29,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:29,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:29,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:29,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044927660] [2022-02-15 13:27:29,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044927660] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:29,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115536459] [2022-02-15 13:27:29,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:27:29,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:29,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:29,959 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) [2022-02-15 13:27:29,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-15 13:27:29,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:27:29,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:29,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:29,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:30,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:27:30,201 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 30 treesize of output 24 [2022-02-15 13:27:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:30,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:30,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:30,565 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 141 treesize of output 121 [2022-02-15 13:27:30,753 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:30,753 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 28 treesize of output 25 [2022-02-15 13:27:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:30,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115536459] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:30,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:30,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:27:30,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372453418] [2022-02-15 13:27:30,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:30,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:27:30,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:30,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:27:30,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:27:30,759 INFO L87 Difference]: Start difference. First operand 987 states and 3168 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:31,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:31,175 INFO L93 Difference]: Finished difference Result 1181 states and 3731 transitions. [2022-02-15 13:27:31,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:27:31,175 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:31,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:31,177 INFO L225 Difference]: With dead ends: 1181 [2022-02-15 13:27:31,177 INFO L226 Difference]: Without dead ends: 1150 [2022-02-15 13:27:31,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:27:31,178 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 106 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:31,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 251 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:27:31,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2022-02-15 13:27:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 994. [2022-02-15 13:27:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 993 states have (on average 3.21852970795569) internal successors, (3196), 993 states have internal predecessors, (3196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 3196 transitions. [2022-02-15 13:27:31,191 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 3196 transitions. Word has length 24 [2022-02-15 13:27:31,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:31,191 INFO L470 AbstractCegarLoop]: Abstraction has 994 states and 3196 transitions. [2022-02-15 13:27:31,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:31,191 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 3196 transitions. [2022-02-15 13:27:31,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:31,193 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:31,193 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:31,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:31,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:31,409 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:31,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:31,409 INFO L85 PathProgramCache]: Analyzing trace with hash 454345047, now seen corresponding path program 57 times [2022-02-15 13:27:31,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:31,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077952598] [2022-02-15 13:27:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:31,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:31,557 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:31,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077952598] [2022-02-15 13:27:31,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077952598] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:31,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217072201] [2022-02-15 13:27:31,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:27:31,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:31,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:31,558 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) [2022-02-15 13:27:31,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-15 13:27:31,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:27:31,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:31,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:27:31,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:31,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:31,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:27:31,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:31,884 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:27:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:31,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:32,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:32,418 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 102 treesize of output 90 [2022-02-15 13:27:32,665 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:32,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-15 13:27:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:32,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217072201] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:32,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:32,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:27:32,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328460886] [2022-02-15 13:27:32,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:32,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:27:32,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:32,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:27:32,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:27:32,671 INFO L87 Difference]: Start difference. First operand 994 states and 3196 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:33,560 INFO L93 Difference]: Finished difference Result 1449 states and 4456 transitions. [2022-02-15 13:27:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:27:33,560 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:33,562 INFO L225 Difference]: With dead ends: 1449 [2022-02-15 13:27:33,562 INFO L226 Difference]: Without dead ends: 1296 [2022-02-15 13:27:33,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:27:33,563 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 179 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:33,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 300 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 764 Invalid, 0 Unknown, 260 Unchecked, 0.3s Time] [2022-02-15 13:27:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2022-02-15 13:27:33,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 992. [2022-02-15 13:27:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.2179616548940464) internal successors, (3189), 991 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:33,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3189 transitions. [2022-02-15 13:27:33,575 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3189 transitions. Word has length 24 [2022-02-15 13:27:33,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:33,575 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 3189 transitions. [2022-02-15 13:27:33,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:33,576 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3189 transitions. [2022-02-15 13:27:33,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:33,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:33,577 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:33,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-02-15 13:27:33,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:33,778 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:33,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:33,778 INFO L85 PathProgramCache]: Analyzing trace with hash 565577591, now seen corresponding path program 58 times [2022-02-15 13:27:33,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:33,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375502121] [2022-02-15 13:27:33,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:33,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:33,952 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:27:33,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:33,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375502121] [2022-02-15 13:27:33,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375502121] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:33,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384353994] [2022-02-15 13:27:33,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:27:33,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:33,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:33,954 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) [2022-02-15 13:27:33,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-15 13:27:33,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:27:33,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:33,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:33,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:34,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:27:34,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:27:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:27:34,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:34,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:34,724 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 143 treesize of output 123 [2022-02-15 13:27:34,879 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:34,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:27:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:27:34,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384353994] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:34,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:34,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:27:34,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251330744] [2022-02-15 13:27:34,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:34,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:27:34,882 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:34,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:27:34,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:27:34,882 INFO L87 Difference]: Start difference. First operand 992 states and 3189 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-02-15 13:27:35,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:35,206 INFO L93 Difference]: Finished difference Result 1159 states and 3670 transitions. [2022-02-15 13:27:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:27:35,206 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 24 [2022-02-15 13:27:35,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:35,208 INFO L225 Difference]: With dead ends: 1159 [2022-02-15 13:27:35,208 INFO L226 Difference]: Without dead ends: 1132 [2022-02-15 13:27:35,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:27:35,209 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 82 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:35,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 249 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:27:35,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-02-15 13:27:35,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 986. [2022-02-15 13:27:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.213197969543147) internal successors, (3165), 985 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:35,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3165 transitions. [2022-02-15 13:27:35,220 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3165 transitions. Word has length 24 [2022-02-15 13:27:35,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:35,220 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 3165 transitions. [2022-02-15 13:27:35,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-02-15 13:27:35,220 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3165 transitions. [2022-02-15 13:27:35,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:35,222 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:35,222 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:35,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:35,435 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,SelfDestructingSolverStorable73 [2022-02-15 13:27:35,435 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:35,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:35,436 INFO L85 PathProgramCache]: Analyzing trace with hash 2142166499, now seen corresponding path program 59 times [2022-02-15 13:27:35,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:35,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644529561] [2022-02-15 13:27:35,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:35,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:35,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:35,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644529561] [2022-02-15 13:27:35,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644529561] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:35,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462822628] [2022-02-15 13:27:35,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:27:35,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:35,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:35,643 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) [2022-02-15 13:27:35,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-15 13:27:35,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:27:35,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:35,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:35,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:35,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:35,828 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:27:35,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:35,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 37 [2022-02-15 13:27:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:36,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:36,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:36,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-02-15 13:27:36,796 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:36,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:27:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:36,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462822628] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:36,802 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:36,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:27:36,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481059890] [2022-02-15 13:27:36,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:36,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:27:36,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:36,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:27:36,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:27:36,802 INFO L87 Difference]: Start difference. First operand 986 states and 3165 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:37,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:37,217 INFO L93 Difference]: Finished difference Result 1225 states and 3857 transitions. [2022-02-15 13:27:37,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:27:37,217 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:37,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:37,219 INFO L225 Difference]: With dead ends: 1225 [2022-02-15 13:27:37,219 INFO L226 Difference]: Without dead ends: 1128 [2022-02-15 13:27:37,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:27:37,220 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 112 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:37,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 213 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 561 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-02-15 13:27:37,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-02-15 13:27:37,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 987. [2022-02-15 13:27:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 3.213995943204868) internal successors, (3169), 986 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:37,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 3169 transitions. [2022-02-15 13:27:37,232 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 3169 transitions. Word has length 24 [2022-02-15 13:27:37,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:37,232 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 3169 transitions. [2022-02-15 13:27:37,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:37,232 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 3169 transitions. [2022-02-15 13:27:37,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:37,234 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:37,234 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:37,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:37,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-02-15 13:27:37,445 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:37,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2026645785, now seen corresponding path program 60 times [2022-02-15 13:27:37,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:37,446 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003211704] [2022-02-15 13:27:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:37,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:37,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:37,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003211704] [2022-02-15 13:27:37,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003211704] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:37,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31676879] [2022-02-15 13:27:37,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:27:37,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:37,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:37,592 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) [2022-02-15 13:27:37,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-15 13:27:37,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:27:37,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:37,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:37,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:37,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:37,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:27:37,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:37,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:27:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:37,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:38,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:38,339 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 143 treesize of output 123 [2022-02-15 13:27:38,450 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:38,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:27:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:38,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31676879] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:38,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:38,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:27:38,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258316983] [2022-02-15 13:27:38,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:38,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:27:38,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:38,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:27:38,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:27:38,480 INFO L87 Difference]: Start difference. First operand 987 states and 3169 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:38,633 INFO L93 Difference]: Finished difference Result 1141 states and 3626 transitions. [2022-02-15 13:27:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:27:38,633 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:38,634 INFO L225 Difference]: With dead ends: 1141 [2022-02-15 13:27:38,634 INFO L226 Difference]: Without dead ends: 1083 [2022-02-15 13:27:38,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:27:38,635 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 76 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:38,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 145 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 243 Invalid, 0 Unknown, 233 Unchecked, 0.1s Time] [2022-02-15 13:27:38,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2022-02-15 13:27:38,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 992. [2022-02-15 13:27:38,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.218970736629667) internal successors, (3190), 991 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:38,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3190 transitions. [2022-02-15 13:27:38,646 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3190 transitions. Word has length 24 [2022-02-15 13:27:38,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:38,646 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 3190 transitions. [2022-02-15 13:27:38,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:38,646 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3190 transitions. [2022-02-15 13:27:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:38,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:38,648 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:38,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-02-15 13:27:38,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:38,850 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:38,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:38,850 INFO L85 PathProgramCache]: Analyzing trace with hash 209206519, now seen corresponding path program 61 times [2022-02-15 13:27:38,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:38,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668090048] [2022-02-15 13:27:38,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:38,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:39,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:39,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668090048] [2022-02-15 13:27:39,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668090048] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:39,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714273870] [2022-02-15 13:27:39,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:27:39,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:39,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:39,039 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) [2022-02-15 13:27:39,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-15 13:27:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:39,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:39,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:39,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:39,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:27:39,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:39,306 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:27:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:39,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:39,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:39,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-15 13:27:39,944 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:39,945 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 28 treesize of output 25 [2022-02-15 13:27:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:39,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714273870] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:39,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:39,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:27:39,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075705425] [2022-02-15 13:27:39,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:39,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:27:39,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:39,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:27:39,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:27:39,948 INFO L87 Difference]: Start difference. First operand 992 states and 3190 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:40,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:40,060 INFO L93 Difference]: Finished difference Result 1096 states and 3494 transitions. [2022-02-15 13:27:40,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:27:40,060 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:40,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:40,065 INFO L225 Difference]: With dead ends: 1096 [2022-02-15 13:27:40,065 INFO L226 Difference]: Without dead ends: 1081 [2022-02-15 13:27:40,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:27:40,068 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:40,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 193 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 329 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2022-02-15 13:27:40,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2022-02-15 13:27:40,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 998. [2022-02-15 13:27:40,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 3.2246740220661985) internal successors, (3215), 997 states have internal predecessors, (3215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:40,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 3215 transitions. [2022-02-15 13:27:40,090 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 3215 transitions. Word has length 24 [2022-02-15 13:27:40,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:40,090 INFO L470 AbstractCegarLoop]: Abstraction has 998 states and 3215 transitions. [2022-02-15 13:27:40,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 3215 transitions. [2022-02-15 13:27:40,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:40,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:40,092 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:40,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:40,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:40,307 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:40,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:40,308 INFO L85 PathProgramCache]: Analyzing trace with hash -108833991, now seen corresponding path program 62 times [2022-02-15 13:27:40,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:40,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283489516] [2022-02-15 13:27:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:40,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:40,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:40,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283489516] [2022-02-15 13:27:40,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283489516] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:40,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651132344] [2022-02-15 13:27:40,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:27:40,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:40,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:40,521 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) [2022-02-15 13:27:40,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-15 13:27:40,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:27:40,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:40,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:40,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:40,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:40,728 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:27:40,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:40,923 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:27:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:41,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:41,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:41,757 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 143 treesize of output 123 [2022-02-15 13:27:41,974 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:41,975 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 28 treesize of output 25 [2022-02-15 13:27:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:41,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651132344] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:41,980 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:41,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:27:41,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579643101] [2022-02-15 13:27:41,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:41,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:27:41,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:41,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:27:41,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:27:41,980 INFO L87 Difference]: Start difference. First operand 998 states and 3215 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:42,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:42,171 INFO L93 Difference]: Finished difference Result 1092 states and 3483 transitions. [2022-02-15 13:27:42,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:27:42,171 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:42,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:42,173 INFO L225 Difference]: With dead ends: 1092 [2022-02-15 13:27:42,173 INFO L226 Difference]: Without dead ends: 1077 [2022-02-15 13:27:42,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:27:42,174 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:42,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 200 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 385 Invalid, 0 Unknown, 284 Unchecked, 0.2s Time] [2022-02-15 13:27:42,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-02-15 13:27:42,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 995. [2022-02-15 13:27:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 3.2203219315895373) internal successors, (3201), 994 states have internal predecessors, (3201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 3201 transitions. [2022-02-15 13:27:42,185 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 3201 transitions. Word has length 24 [2022-02-15 13:27:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:42,185 INFO L470 AbstractCegarLoop]: Abstraction has 995 states and 3201 transitions. [2022-02-15 13:27:42,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:42,185 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 3201 transitions. [2022-02-15 13:27:42,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:42,187 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:42,187 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:42,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-02-15 13:27:42,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-02-15 13:27:42,397 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:42,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:42,397 INFO L85 PathProgramCache]: Analyzing trace with hash 478081611, now seen corresponding path program 63 times [2022-02-15 13:27:42,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:42,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585054554] [2022-02-15 13:27:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:42,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:42,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:42,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585054554] [2022-02-15 13:27:42,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585054554] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:42,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022174104] [2022-02-15 13:27:42,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:27:42,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:42,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:42,554 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) [2022-02-15 13:27:42,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-15 13:27:42,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:27:42,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:42,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:42,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:42,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:42,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:27:42,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-15 13:27:42,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:42,919 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:27:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:42,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:43,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:43,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 71 [2022-02-15 13:27:43,658 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:43,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:27:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:43,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022174104] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:43,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:43,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:27:43,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530011795] [2022-02-15 13:27:43,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:43,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:27:43,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:43,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:27:43,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:27:43,664 INFO L87 Difference]: Start difference. First operand 995 states and 3201 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) [2022-02-15 13:27:43,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:43,919 INFO L93 Difference]: Finished difference Result 1102 states and 3481 transitions. [2022-02-15 13:27:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:27:43,919 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 24 [2022-02-15 13:27:43,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:43,920 INFO L225 Difference]: With dead ends: 1102 [2022-02-15 13:27:43,920 INFO L226 Difference]: Without dead ends: 1041 [2022-02-15 13:27:43,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:27:43,921 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 83 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 297 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:43,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 155 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 309 Invalid, 0 Unknown, 297 Unchecked, 0.1s Time] [2022-02-15 13:27:43,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-02-15 13:27:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 995. [2022-02-15 13:27:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 3.2132796780684103) internal successors, (3194), 994 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:43,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 3194 transitions. [2022-02-15 13:27:43,931 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 3194 transitions. Word has length 24 [2022-02-15 13:27:43,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:43,932 INFO L470 AbstractCegarLoop]: Abstraction has 995 states and 3194 transitions. [2022-02-15 13:27:43,932 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) [2022-02-15 13:27:43,932 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 3194 transitions. [2022-02-15 13:27:43,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:43,933 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:43,933 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:43,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-15 13:27:44,133 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,SelfDestructingSolverStorable78 [2022-02-15 13:27:44,134 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:44,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:44,134 INFO L85 PathProgramCache]: Analyzing trace with hash -6321159, now seen corresponding path program 64 times [2022-02-15 13:27:44,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:44,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629646056] [2022-02-15 13:27:44,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:44,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:44,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:44,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:44,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629646056] [2022-02-15 13:27:44,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629646056] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:44,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183439139] [2022-02-15 13:27:44,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:27:44,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:44,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:44,327 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) [2022-02-15 13:27:44,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-15 13:27:44,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:27:44,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:44,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:44,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:44,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:44,524 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:27:44,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:44,628 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:27:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:44,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:45,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:45,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:27:45,386 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:45,387 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 28 treesize of output 25 [2022-02-15 13:27:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:45,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183439139] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:45,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:45,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:27:45,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108889060] [2022-02-15 13:27:45,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:45,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:27:45,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:45,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:27:45,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:27:45,392 INFO L87 Difference]: Start difference. First operand 995 states and 3194 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:45,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:45,635 INFO L93 Difference]: Finished difference Result 1149 states and 3657 transitions. [2022-02-15 13:27:45,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:27:45,635 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:45,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:45,637 INFO L225 Difference]: With dead ends: 1149 [2022-02-15 13:27:45,637 INFO L226 Difference]: Without dead ends: 1114 [2022-02-15 13:27:45,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:27:45,638 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 84 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:45,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 189 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 455 Invalid, 0 Unknown, 210 Unchecked, 0.2s Time] [2022-02-15 13:27:45,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-02-15 13:27:45,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 997. [2022-02-15 13:27:45,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 3.211847389558233) internal successors, (3199), 996 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:45,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 3199 transitions. [2022-02-15 13:27:45,650 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 3199 transitions. Word has length 24 [2022-02-15 13:27:45,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:45,651 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 3199 transitions. [2022-02-15 13:27:45,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 3199 transitions. [2022-02-15 13:27:45,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:45,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:45,652 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:45,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:45,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:45,867 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:45,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:45,868 INFO L85 PathProgramCache]: Analyzing trace with hash 682689027, now seen corresponding path program 65 times [2022-02-15 13:27:45,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:45,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124231067] [2022-02-15 13:27:45,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:45,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:46,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:46,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124231067] [2022-02-15 13:27:46,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124231067] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:46,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143711356] [2022-02-15 13:27:46,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:27:46,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:46,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:46,034 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) [2022-02-15 13:27:46,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-15 13:27:46,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:27:46,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:46,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:46,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:46,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:46,223 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:27:46,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:46,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:27:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:46,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:46,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:46,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:27:47,048 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:47,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:27:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:47,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143711356] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:47,053 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:47,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:27:47,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562229164] [2022-02-15 13:27:47,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:47,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:27:47,053 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:47,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:27:47,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:27:47,053 INFO L87 Difference]: Start difference. First operand 997 states and 3199 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:47,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:47,318 INFO L93 Difference]: Finished difference Result 1119 states and 3537 transitions. [2022-02-15 13:27:47,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:27:47,333 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:47,335 INFO L225 Difference]: With dead ends: 1119 [2022-02-15 13:27:47,335 INFO L226 Difference]: Without dead ends: 1088 [2022-02-15 13:27:47,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:27:47,336 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:47,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 223 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 448 Invalid, 0 Unknown, 172 Unchecked, 0.2s Time] [2022-02-15 13:27:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2022-02-15 13:27:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 997. [2022-02-15 13:27:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 3.211847389558233) internal successors, (3199), 996 states have internal predecessors, (3199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 3199 transitions. [2022-02-15 13:27:47,348 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 3199 transitions. Word has length 24 [2022-02-15 13:27:47,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:47,348 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 3199 transitions. [2022-02-15 13:27:47,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:47,348 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 3199 transitions. [2022-02-15 13:27:47,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:47,349 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:47,350 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:47,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-02-15 13:27:47,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:47,556 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:47,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:47,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1771342737, now seen corresponding path program 66 times [2022-02-15 13:27:47,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:47,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995288173] [2022-02-15 13:27:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:47,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:47,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:47,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995288173] [2022-02-15 13:27:47,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995288173] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:47,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140391880] [2022-02-15 13:27:47,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:27:47,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:47,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:47,707 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) [2022-02-15 13:27:47,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-15 13:27:47,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:27:47,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:47,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:47,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:27:47,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:27:48,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:48,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:48,575 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:48,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-02-15 13:27:48,703 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:48,703 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 28 treesize of output 25 [2022-02-15 13:27:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:48,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140391880] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:48,708 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:48,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:27:48,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632378166] [2022-02-15 13:27:48,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:48,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:27:48,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:48,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:27:48,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:27:48,709 INFO L87 Difference]: Start difference. First operand 997 states and 3199 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:49,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:49,102 INFO L93 Difference]: Finished difference Result 1348 states and 4313 transitions. [2022-02-15 13:27:49,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:27:49,102 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:49,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:49,104 INFO L225 Difference]: With dead ends: 1348 [2022-02-15 13:27:49,104 INFO L226 Difference]: Without dead ends: 1265 [2022-02-15 13:27:49,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:27:49,105 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 87 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:49,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 226 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 626 Invalid, 0 Unknown, 160 Unchecked, 0.3s Time] [2022-02-15 13:27:49,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-02-15 13:27:49,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1018. [2022-02-15 13:27:49,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 3.207472959685349) internal successors, (3262), 1017 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 3262 transitions. [2022-02-15 13:27:49,117 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 3262 transitions. Word has length 24 [2022-02-15 13:27:49,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:49,117 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 3262 transitions. [2022-02-15 13:27:49,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:49,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 3262 transitions. [2022-02-15 13:27:49,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:49,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:49,119 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:49,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:49,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:49,330 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:49,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:49,331 INFO L85 PathProgramCache]: Analyzing trace with hash -672599755, now seen corresponding path program 67 times [2022-02-15 13:27:49,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:49,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643271497] [2022-02-15 13:27:49,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:49,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:49,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:49,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643271497] [2022-02-15 13:27:49,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643271497] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:49,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550155297] [2022-02-15 13:27:49,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:27:49,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:49,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:49,508 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) [2022-02-15 13:27:49,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-15 13:27:49,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:49,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:27:49,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:49,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:27:49,835 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 30 treesize of output 24 [2022-02-15 13:27:49,951 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:49,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:50,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:50,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-15 13:27:50,743 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:50,744 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 32 treesize of output 29 [2022-02-15 13:27:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:50,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550155297] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:50,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:50,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:27:50,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229733619] [2022-02-15 13:27:50,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:50,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:27:50,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:50,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:27:50,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:27:50,750 INFO L87 Difference]: Start difference. First operand 1018 states and 3262 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:27:52,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:52,181 INFO L93 Difference]: Finished difference Result 1722 states and 5259 transitions. [2022-02-15 13:27:52,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:27:52,181 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:27:52,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:52,184 INFO L225 Difference]: With dead ends: 1722 [2022-02-15 13:27:52,184 INFO L226 Difference]: Without dead ends: 1588 [2022-02-15 13:27:52,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:27:52,185 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 135 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:52,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 394 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 970 Invalid, 0 Unknown, 185 Unchecked, 0.5s Time] [2022-02-15 13:27:52,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2022-02-15 13:27:52,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1048. [2022-02-15 13:27:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 3.2206303724928365) internal successors, (3372), 1047 states have internal predecessors, (3372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 3372 transitions. [2022-02-15 13:27:52,199 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 3372 transitions. Word has length 24 [2022-02-15 13:27:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:52,199 INFO L470 AbstractCegarLoop]: Abstraction has 1048 states and 3372 transitions. [2022-02-15 13:27:52,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:27:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 3372 transitions. [2022-02-15 13:27:52,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:52,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:52,201 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:52,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:52,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:52,403 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:52,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:52,403 INFO L85 PathProgramCache]: Analyzing trace with hash 570166173, now seen corresponding path program 68 times [2022-02-15 13:27:52,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:52,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477596834] [2022-02-15 13:27:52,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:52,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:52,635 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:52,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477596834] [2022-02-15 13:27:52,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477596834] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:52,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602010667] [2022-02-15 13:27:52,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:27:52,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:52,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:52,637 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) [2022-02-15 13:27:52,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-15 13:27:52,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:27:52,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:52,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:52,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:52,810 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 26 treesize of output 20 [2022-02-15 13:27:52,849 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 30 treesize of output 24 [2022-02-15 13:27:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:53,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:53,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:53,486 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 143 treesize of output 123 [2022-02-15 13:27:53,659 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:53,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:27:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:53,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602010667] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:53,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:53,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:27:53,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465396996] [2022-02-15 13:27:53,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:53,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:27:53,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:53,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:27:53,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:27:53,665 INFO L87 Difference]: Start difference. First operand 1048 states and 3372 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) [2022-02-15 13:27:53,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:53,927 INFO L93 Difference]: Finished difference Result 1345 states and 4229 transitions. [2022-02-15 13:27:53,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:27:53,927 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 24 [2022-02-15 13:27:53,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:53,930 INFO L225 Difference]: With dead ends: 1345 [2022-02-15 13:27:53,930 INFO L226 Difference]: Without dead ends: 1283 [2022-02-15 13:27:53,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:27:53,930 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 101 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:53,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 252 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 580 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-02-15 13:27:53,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2022-02-15 13:27:53,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1063. [2022-02-15 13:27:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 3.2175141242937855) internal successors, (3417), 1062 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 3417 transitions. [2022-02-15 13:27:53,943 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 3417 transitions. Word has length 24 [2022-02-15 13:27:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:53,944 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 3417 transitions. [2022-02-15 13:27:53,944 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) [2022-02-15 13:27:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 3417 transitions. [2022-02-15 13:27:53,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:53,945 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:53,945 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:53,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:54,162 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,SelfDestructingSolverStorable83 [2022-02-15 13:27:54,162 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:54,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:54,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1946331129, now seen corresponding path program 69 times [2022-02-15 13:27:54,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:54,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877648604] [2022-02-15 13:27:54,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:54,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:54,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:54,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877648604] [2022-02-15 13:27:54,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877648604] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:54,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207229841] [2022-02-15 13:27:54,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:27:54,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:54,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:54,299 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) [2022-02-15 13:27:54,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-15 13:27:54,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:27:54,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:54,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:54,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:54,438 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 26 treesize of output 20 [2022-02-15 13:27:54,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:27:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:54,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:54,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:54,954 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 46 treesize of output 44 [2022-02-15 13:27:55,053 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:55,054 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 28 treesize of output 25 [2022-02-15 13:27:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:55,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207229841] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:55,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:55,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-15 13:27:55,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616451048] [2022-02-15 13:27:55,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:55,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:27:55,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:55,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:27:55,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:27:55,058 INFO L87 Difference]: Start difference. First operand 1063 states and 3417 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) [2022-02-15 13:27:55,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:55,511 INFO L93 Difference]: Finished difference Result 1664 states and 5266 transitions. [2022-02-15 13:27:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:27:55,511 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 24 [2022-02-15 13:27:55,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:55,514 INFO L225 Difference]: With dead ends: 1664 [2022-02-15 13:27:55,514 INFO L226 Difference]: Without dead ends: 1633 [2022-02-15 13:27:55,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:27:55,514 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 112 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:55,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 237 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:27:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2022-02-15 13:27:55,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1066. [2022-02-15 13:27:55,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1065 states have (on average 3.215962441314554) internal successors, (3425), 1065 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:55,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 3425 transitions. [2022-02-15 13:27:55,529 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 3425 transitions. Word has length 24 [2022-02-15 13:27:55,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:55,529 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 3425 transitions. [2022-02-15 13:27:55,529 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) [2022-02-15 13:27:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 3425 transitions. [2022-02-15 13:27:55,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:55,532 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:55,532 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:55,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:55,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:55,748 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:55,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:55,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1747003993, now seen corresponding path program 70 times [2022-02-15 13:27:55,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:55,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109919178] [2022-02-15 13:27:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:55,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:55,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:55,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109919178] [2022-02-15 13:27:55,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109919178] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:55,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792935775] [2022-02-15 13:27:55,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:27:55,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:55,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:55,968 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) [2022-02-15 13:27:55,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-15 13:27:56,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:27:56,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:56,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:27:56,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:27:56,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:56,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:27:56,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:27:56,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:27:56,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:56,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:27:57,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:27:57,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 63 [2022-02-15 13:27:57,317 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:27:57,317 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 32 treesize of output 29 [2022-02-15 13:27:57,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:57,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792935775] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:27:57,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:27:57,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:27:57,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164862621] [2022-02-15 13:27:57,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:27:57,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:27:57,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:27:57,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:27:57,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:27:57,323 INFO L87 Difference]: Start difference. First operand 1066 states and 3425 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:59,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:27:59,504 INFO L93 Difference]: Finished difference Result 2064 states and 5985 transitions. [2022-02-15 13:27:59,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 13:27:59,504 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:27:59,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:27:59,507 INFO L225 Difference]: With dead ends: 2064 [2022-02-15 13:27:59,507 INFO L226 Difference]: Without dead ends: 1829 [2022-02-15 13:27:59,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=338, Invalid=1824, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 13:27:59,508 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 350 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:27:59,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 472 Invalid, 1321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1102 Invalid, 0 Unknown, 128 Unchecked, 0.5s Time] [2022-02-15 13:27:59,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2022-02-15 13:27:59,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1068. [2022-02-15 13:27:59,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 3.217432052483599) internal successors, (3433), 1067 states have internal predecessors, (3433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:59,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 3433 transitions. [2022-02-15 13:27:59,526 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 3433 transitions. Word has length 24 [2022-02-15 13:27:59,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:27:59,527 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 3433 transitions. [2022-02-15 13:27:59,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:27:59,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 3433 transitions. [2022-02-15 13:27:59,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:27:59,529 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:27:59,529 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:27:59,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-15 13:27:59,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:59,748 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:27:59,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:27:59,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1862524707, now seen corresponding path program 71 times [2022-02-15 13:27:59,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:27:59,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950149583] [2022-02-15 13:27:59,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:27:59,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:27:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:27:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:27:59,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:27:59,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950149583] [2022-02-15 13:27:59,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950149583] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:27:59,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054590922] [2022-02-15 13:27:59,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:27:59,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:27:59,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:27:59,896 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) [2022-02-15 13:27:59,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-15 13:27:59,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:27:59,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:27:59,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:27:59,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:00,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:00,043 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:28:00,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:00,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:28:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:00,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:01,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:01,109 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 120 treesize of output 104 [2022-02-15 13:28:01,196 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:01,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:28:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:01,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054590922] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:01,201 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:01,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:28:01,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580423768] [2022-02-15 13:28:01,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:01,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:28:01,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:01,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:28:01,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:28:01,202 INFO L87 Difference]: Start difference. First operand 1068 states and 3433 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:01,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:01,783 INFO L93 Difference]: Finished difference Result 1302 states and 4118 transitions. [2022-02-15 13:28:01,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:28:01,783 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:01,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:01,785 INFO L225 Difference]: With dead ends: 1302 [2022-02-15 13:28:01,785 INFO L226 Difference]: Without dead ends: 1199 [2022-02-15 13:28:01,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:28:01,786 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 117 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:01,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 196 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 447 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-02-15 13:28:01,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-02-15 13:28:01,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1082. [2022-02-15 13:28:01,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1082 states, 1081 states have (on average 3.2275670675300647) internal successors, (3489), 1081 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:01,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1082 states to 1082 states and 3489 transitions. [2022-02-15 13:28:01,798 INFO L78 Accepts]: Start accepts. Automaton has 1082 states and 3489 transitions. Word has length 24 [2022-02-15 13:28:01,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:01,798 INFO L470 AbstractCegarLoop]: Abstraction has 1082 states and 3489 transitions. [2022-02-15 13:28:01,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:01,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1082 states and 3489 transitions. [2022-02-15 13:28:01,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:01,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:01,800 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:01,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:02,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:02,016 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:02,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:02,017 INFO L85 PathProgramCache]: Analyzing trace with hash 883878415, now seen corresponding path program 72 times [2022-02-15 13:28:02,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:02,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398030992] [2022-02-15 13:28:02,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:02,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:02,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:02,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398030992] [2022-02-15 13:28:02,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398030992] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:02,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029406207] [2022-02-15 13:28:02,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:28:02,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:02,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:02,211 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) [2022-02-15 13:28:02,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-15 13:28:02,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:28:02,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:02,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:28:02,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:02,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:02,367 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:28:02,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:28:02,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:02,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-02-15 13:28:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:02,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:03,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:03,363 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 78 treesize of output 70 [2022-02-15 13:28:03,492 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:03,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-15 13:28:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:03,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029406207] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:03,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:03,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:28:03,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829771586] [2022-02-15 13:28:03,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:03,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:28:03,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:03,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:28:03,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:28:03,498 INFO L87 Difference]: Start difference. First operand 1082 states and 3489 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:03,777 INFO L93 Difference]: Finished difference Result 1196 states and 3793 transitions. [2022-02-15 13:28:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:28:03,777 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:03,779 INFO L225 Difference]: With dead ends: 1196 [2022-02-15 13:28:03,779 INFO L226 Difference]: Without dead ends: 1135 [2022-02-15 13:28:03,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:28:03,779 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:03,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 287 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 573 Invalid, 0 Unknown, 163 Unchecked, 0.2s Time] [2022-02-15 13:28:03,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2022-02-15 13:28:03,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1076. [2022-02-15 13:28:03,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1076 states, 1075 states have (on average 3.222325581395349) internal successors, (3464), 1075 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:03,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1076 states to 1076 states and 3464 transitions. [2022-02-15 13:28:03,791 INFO L78 Accepts]: Start accepts. Automaton has 1076 states and 3464 transitions. Word has length 24 [2022-02-15 13:28:03,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:03,791 INFO L470 AbstractCegarLoop]: Abstraction has 1076 states and 3464 transitions. [2022-02-15 13:28:03,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:03,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1076 states and 3464 transitions. [2022-02-15 13:28:03,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:03,793 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:03,793 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:03,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-02-15 13:28:04,009 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,SelfDestructingSolverStorable87 [2022-02-15 13:28:04,009 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:04,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:04,009 INFO L85 PathProgramCache]: Analyzing trace with hash 399475645, now seen corresponding path program 73 times [2022-02-15 13:28:04,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:04,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754947547] [2022-02-15 13:28:04,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:04,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:04,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:04,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:04,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754947547] [2022-02-15 13:28:04,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754947547] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:04,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120678526] [2022-02-15 13:28:04,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:28:04,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:04,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:04,206 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) [2022-02-15 13:28:04,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-15 13:28:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:04,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:28:04,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:04,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:04,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:28:04,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:04,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:28:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:04,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:05,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:05,127 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 78 treesize of output 70 [2022-02-15 13:28:05,228 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:05,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-15 13:28:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:05,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120678526] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:05,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:05,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:28:05,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904846529] [2022-02-15 13:28:05,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:05,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:28:05,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:05,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:28:05,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:28:05,234 INFO L87 Difference]: Start difference. First operand 1076 states and 3464 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:06,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:06,660 INFO L93 Difference]: Finished difference Result 1410 states and 4292 transitions. [2022-02-15 13:28:06,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 13:28:06,661 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:06,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:06,663 INFO L225 Difference]: With dead ends: 1410 [2022-02-15 13:28:06,663 INFO L226 Difference]: Without dead ends: 1281 [2022-02-15 13:28:06,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 13:28:06,663 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 314 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:06,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 324 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 536 Invalid, 0 Unknown, 446 Unchecked, 0.2s Time] [2022-02-15 13:28:06,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2022-02-15 13:28:06,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 1095. [2022-02-15 13:28:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1094 states have (on average 3.2175502742230346) internal successors, (3520), 1094 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:06,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 3520 transitions. [2022-02-15 13:28:06,677 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 3520 transitions. Word has length 24 [2022-02-15 13:28:06,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:06,677 INFO L470 AbstractCegarLoop]: Abstraction has 1095 states and 3520 transitions. [2022-02-15 13:28:06,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:06,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 3520 transitions. [2022-02-15 13:28:06,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:06,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:06,679 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:06,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:06,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:06,895 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:06,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:06,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1088485831, now seen corresponding path program 74 times [2022-02-15 13:28:06,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:06,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767772367] [2022-02-15 13:28:06,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:06,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:07,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:07,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767772367] [2022-02-15 13:28:07,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767772367] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:07,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063222024] [2022-02-15 13:28:07,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:28:07,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:07,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:07,106 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) [2022-02-15 13:28:07,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-15 13:28:07,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:28:07,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:07,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:28:07,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:07,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:07,247 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:28:07,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:07,428 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:28:07,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:07,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:08,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:08,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-02-15 13:28:08,169 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:08,169 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 28 treesize of output 25 [2022-02-15 13:28:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:08,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063222024] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:08,174 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:08,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:28:08,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095835782] [2022-02-15 13:28:08,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:08,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:28:08,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:08,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:28:08,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:28:08,175 INFO L87 Difference]: Start difference. First operand 1095 states and 3520 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-02-15 13:28:08,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:08,365 INFO L93 Difference]: Finished difference Result 1217 states and 3862 transitions. [2022-02-15 13:28:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:28:08,365 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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 24 [2022-02-15 13:28:08,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:08,367 INFO L225 Difference]: With dead ends: 1217 [2022-02-15 13:28:08,367 INFO L226 Difference]: Without dead ends: 1186 [2022-02-15 13:28:08,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:28:08,368 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:08,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 244 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 438 Invalid, 0 Unknown, 156 Unchecked, 0.2s Time] [2022-02-15 13:28:08,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2022-02-15 13:28:08,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1097. [2022-02-15 13:28:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1097 states, 1096 states have (on average 3.216240875912409) internal successors, (3525), 1096 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:08,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1097 states to 1097 states and 3525 transitions. [2022-02-15 13:28:08,380 INFO L78 Accepts]: Start accepts. Automaton has 1097 states and 3525 transitions. Word has length 24 [2022-02-15 13:28:08,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:08,380 INFO L470 AbstractCegarLoop]: Abstraction has 1097 states and 3525 transitions. [2022-02-15 13:28:08,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-02-15 13:28:08,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1097 states and 3525 transitions. [2022-02-15 13:28:08,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:08,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:08,381 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:08,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-02-15 13:28:08,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:08,601 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:08,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:08,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2024529937, now seen corresponding path program 75 times [2022-02-15 13:28:08,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:08,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495542100] [2022-02-15 13:28:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:08,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:08,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:08,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495542100] [2022-02-15 13:28:08,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495542100] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:08,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581352213] [2022-02-15 13:28:08,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:28:08,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:08,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:08,866 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) [2022-02-15 13:28:08,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-15 13:28:08,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:28:08,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:08,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:28:08,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:09,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:09,013 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:28:09,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:09,104 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:28:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:09,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:09,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:09,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 44 [2022-02-15 13:28:09,844 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:09,844 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 28 treesize of output 25 [2022-02-15 13:28:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:09,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581352213] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:09,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:09,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:28:09,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113963343] [2022-02-15 13:28:09,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:09,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:28:09,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:09,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:28:09,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:28:09,850 INFO L87 Difference]: Start difference. First operand 1097 states and 3525 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:10,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:10,664 INFO L93 Difference]: Finished difference Result 1396 states and 4462 transitions. [2022-02-15 13:28:10,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:28:10,665 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:10,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:10,667 INFO L225 Difference]: With dead ends: 1396 [2022-02-15 13:28:10,667 INFO L226 Difference]: Without dead ends: 1323 [2022-02-15 13:28:10,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:28:10,667 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 147 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:10,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 258 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 505 Invalid, 0 Unknown, 143 Unchecked, 0.2s Time] [2022-02-15 13:28:10,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2022-02-15 13:28:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 1111. [2022-02-15 13:28:10,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1110 states have (on average 3.2261261261261263) internal successors, (3581), 1110 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:10,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3581 transitions. [2022-02-15 13:28:10,681 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3581 transitions. Word has length 24 [2022-02-15 13:28:10,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:10,681 INFO L470 AbstractCegarLoop]: Abstraction has 1111 states and 3581 transitions. [2022-02-15 13:28:10,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:10,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3581 transitions. [2022-02-15 13:28:10,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:10,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:10,682 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:10,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:10,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:10,897 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:10,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:10,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1335519751, now seen corresponding path program 76 times [2022-02-15 13:28:10,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:10,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416705359] [2022-02-15 13:28:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:10,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:10,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:28:11,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:11,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416705359] [2022-02-15 13:28:11,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416705359] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:11,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421434991] [2022-02-15 13:28:11,162 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:28:11,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:11,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:11,164 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) [2022-02-15 13:28:11,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-15 13:28:11,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:28:11,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:11,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:28:11,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:11,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:11,313 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:28:11,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:11,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:28:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:28:11,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:12,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:12,286 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 73 treesize of output 67 [2022-02-15 13:28:12,397 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:12,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-15 13:28:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:28:12,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421434991] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:12,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:12,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:28:12,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073390862] [2022-02-15 13:28:12,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:12,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:28:12,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:12,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:28:12,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:28:12,403 INFO L87 Difference]: Start difference. First operand 1111 states and 3581 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:13,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:13,444 INFO L93 Difference]: Finished difference Result 1668 states and 5119 transitions. [2022-02-15 13:28:13,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:28:13,444 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:13,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:13,447 INFO L225 Difference]: With dead ends: 1668 [2022-02-15 13:28:13,447 INFO L226 Difference]: Without dead ends: 1488 [2022-02-15 13:28:13,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:28:13,447 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 233 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:13,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 326 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 682 Invalid, 0 Unknown, 278 Unchecked, 0.3s Time] [2022-02-15 13:28:13,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-02-15 13:28:13,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1125. [2022-02-15 13:28:13,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 3.2295373665480427) internal successors, (3630), 1124 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:13,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3630 transitions. [2022-02-15 13:28:13,462 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3630 transitions. Word has length 24 [2022-02-15 13:28:13,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:13,462 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 3630 transitions. [2022-02-15 13:28:13,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:13,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3630 transitions. [2022-02-15 13:28:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:13,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:13,463 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:13,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-02-15 13:28:13,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:13,664 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:13,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:13,664 INFO L85 PathProgramCache]: Analyzing trace with hash 721873185, now seen corresponding path program 77 times [2022-02-15 13:28:13,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:13,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444604132] [2022-02-15 13:28:13,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:13,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:13,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:13,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444604132] [2022-02-15 13:28:13,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444604132] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:13,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515400403] [2022-02-15 13:28:13,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:28:13,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:13,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:13,868 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) [2022-02-15 13:28:13,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-15 13:28:13,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:28:13,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:13,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:28:13,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:14,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:14,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:28:14,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:14,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-15 13:28:14,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 13:28:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:14,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:14,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:14,675 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 48 [2022-02-15 13:28:14,713 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:14,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:28:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:14,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515400403] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:14,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:14,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:28:14,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846274919] [2022-02-15 13:28:14,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:14,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:28:14,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:14,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:28:14,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:28:14,718 INFO L87 Difference]: Start difference. First operand 1125 states and 3630 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:15,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:15,080 INFO L93 Difference]: Finished difference Result 1416 states and 4562 transitions. [2022-02-15 13:28:15,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:28:15,081 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:15,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:15,084 INFO L225 Difference]: With dead ends: 1416 [2022-02-15 13:28:15,084 INFO L226 Difference]: Without dead ends: 1358 [2022-02-15 13:28:15,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:28:15,085 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 97 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:15,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 239 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 239 Unchecked, 0.1s Time] [2022-02-15 13:28:15,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-02-15 13:28:15,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1198. [2022-02-15 13:28:15,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 3.239766081871345) internal successors, (3878), 1197 states have internal predecessors, (3878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:15,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3878 transitions. [2022-02-15 13:28:15,108 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3878 transitions. Word has length 24 [2022-02-15 13:28:15,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:15,109 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 3878 transitions. [2022-02-15 13:28:15,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:15,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3878 transitions. [2022-02-15 13:28:15,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:15,111 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:15,111 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:15,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:15,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:15,321 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:15,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:15,322 INFO L85 PathProgramCache]: Analyzing trace with hash 46491257, now seen corresponding path program 78 times [2022-02-15 13:28:15,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:15,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913437215] [2022-02-15 13:28:15,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:15,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:15,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:15,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913437215] [2022-02-15 13:28:15,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913437215] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:15,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520145117] [2022-02-15 13:28:15,506 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:28:15,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:15,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:15,507 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) [2022-02-15 13:28:15,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-15 13:28:15,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:28:15,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:15,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:28:15,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:15,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:15,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:28:15,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:15,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 21 treesize of output 17 [2022-02-15 13:28:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:15,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:16,442 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:16,443 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 50 treesize of output 47 [2022-02-15 13:28:16,497 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:16,497 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 28 treesize of output 25 [2022-02-15 13:28:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:16,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520145117] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:16,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:16,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:28:16,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318924843] [2022-02-15 13:28:16,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:16,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:28:16,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:16,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:28:16,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:28:16,503 INFO L87 Difference]: Start difference. First operand 1198 states and 3878 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:16,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:16,827 INFO L93 Difference]: Finished difference Result 1471 states and 4775 transitions. [2022-02-15 13:28:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:28:16,827 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:16,830 INFO L225 Difference]: With dead ends: 1471 [2022-02-15 13:28:16,830 INFO L226 Difference]: Without dead ends: 1464 [2022-02-15 13:28:16,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:28:16,830 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 121 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 569 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:16,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 265 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 295 Invalid, 0 Unknown, 569 Unchecked, 0.1s Time] [2022-02-15 13:28:16,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-02-15 13:28:16,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1241. [2022-02-15 13:28:16,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.236290322580645) internal successors, (4013), 1240 states have internal predecessors, (4013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:16,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4013 transitions. [2022-02-15 13:28:16,845 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4013 transitions. Word has length 24 [2022-02-15 13:28:16,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:16,845 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 4013 transitions. [2022-02-15 13:28:16,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:16,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4013 transitions. [2022-02-15 13:28:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:16,847 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:16,847 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:16,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-02-15 13:28:17,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:17,061 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:17,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:17,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1838477509, now seen corresponding path program 79 times [2022-02-15 13:28:17,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:17,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404650265] [2022-02-15 13:28:17,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:17,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:28:17,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:17,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404650265] [2022-02-15 13:28:17,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404650265] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:17,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425267416] [2022-02-15 13:28:17,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:28:17,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:17,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:17,251 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) [2022-02-15 13:28:17,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-15 13:28:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:17,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:28:17,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:17,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:17,396 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:28:17,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:17,603 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:28:17,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-02-15 13:28:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:28:17,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:18,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:18,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-15 13:28:18,169 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:18,169 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 32 treesize of output 29 [2022-02-15 13:28:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:28:18,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425267416] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:18,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:18,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:28:18,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686158239] [2022-02-15 13:28:18,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:18,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:28:18,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:18,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:28:18,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:28:18,192 INFO L87 Difference]: Start difference. First operand 1241 states and 4013 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:18,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:18,521 INFO L93 Difference]: Finished difference Result 1424 states and 4503 transitions. [2022-02-15 13:28:18,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:28:18,521 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:18,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:18,523 INFO L225 Difference]: With dead ends: 1424 [2022-02-15 13:28:18,523 INFO L226 Difference]: Without dead ends: 1364 [2022-02-15 13:28:18,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:28:18,524 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 62 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:18,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 368 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 475 Invalid, 0 Unknown, 124 Unchecked, 0.2s Time] [2022-02-15 13:28:18,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2022-02-15 13:28:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1241. [2022-02-15 13:28:18,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1240 states have (on average 3.2298387096774195) internal successors, (4005), 1240 states have internal predecessors, (4005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:18,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 4005 transitions. [2022-02-15 13:28:18,538 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 4005 transitions. Word has length 24 [2022-02-15 13:28:18,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:18,538 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 4005 transitions. [2022-02-15 13:28:18,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:18,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 4005 transitions. [2022-02-15 13:28:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:18,540 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:18,540 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:18,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:18,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2022-02-15 13:28:18,756 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:18,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:18,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1646985943, now seen corresponding path program 80 times [2022-02-15 13:28:18,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:18,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825381616] [2022-02-15 13:28:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:18,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:28:18,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:18,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825381616] [2022-02-15 13:28:18,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825381616] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:18,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254857923] [2022-02-15 13:28:18,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:28:18,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:18,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:18,924 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) [2022-02-15 13:28:18,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-15 13:28:18,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:28:18,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:18,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:28:18,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:19,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:19,039 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:28:19,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:19,170 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:28:19,171 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 22 treesize of output 14 [2022-02-15 13:28:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:28:19,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:19,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:19,620 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 120 treesize of output 104 [2022-02-15 13:28:19,683 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:19,684 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 28 treesize of output 25 [2022-02-15 13:28:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:28:19,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254857923] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:19,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:19,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:28:19,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061700721] [2022-02-15 13:28:19,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:19,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:28:19,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:19,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:28:19,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:28:19,688 INFO L87 Difference]: Start difference. First operand 1241 states and 4005 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) [2022-02-15 13:28:19,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:19,813 INFO L93 Difference]: Finished difference Result 1396 states and 4459 transitions. [2022-02-15 13:28:19,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:28:19,813 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 24 [2022-02-15 13:28:19,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:19,815 INFO L225 Difference]: With dead ends: 1396 [2022-02-15 13:28:19,815 INFO L226 Difference]: Without dead ends: 1369 [2022-02-15 13:28:19,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:28:19,816 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 62 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:19,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 235 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 352 Invalid, 0 Unknown, 144 Unchecked, 0.1s Time] [2022-02-15 13:28:19,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-02-15 13:28:19,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1243. [2022-02-15 13:28:19,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 1242 states have (on average 3.2302737520128826) internal successors, (4012), 1242 states have internal predecessors, (4012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 4012 transitions. [2022-02-15 13:28:19,830 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 4012 transitions. Word has length 24 [2022-02-15 13:28:19,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:19,830 INFO L470 AbstractCegarLoop]: Abstraction has 1243 states and 4012 transitions. [2022-02-15 13:28:19,830 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) [2022-02-15 13:28:19,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 4012 transitions. [2022-02-15 13:28:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:19,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:19,831 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:19,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-02-15 13:28:20,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:20,036 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:20,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:20,036 INFO L85 PathProgramCache]: Analyzing trace with hash 766546883, now seen corresponding path program 81 times [2022-02-15 13:28:20,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:20,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019507471] [2022-02-15 13:28:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:20,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:28:20,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:20,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019507471] [2022-02-15 13:28:20,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019507471] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:20,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508611473] [2022-02-15 13:28:20,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:28:20,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:20,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:20,227 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) [2022-02-15 13:28:20,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-15 13:28:20,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:28:20,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:20,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-15 13:28:20,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:20,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:20,375 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:28:20,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:20,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 23 [2022-02-15 13:28:20,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-15 13:28:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:28:20,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:21,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:21,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 98 [2022-02-15 13:28:21,309 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:21,309 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 28 treesize of output 25 [2022-02-15 13:28:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:28:21,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508611473] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:21,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:21,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:28:21,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991379247] [2022-02-15 13:28:21,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:21,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:28:21,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:21,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:28:21,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:28:21,315 INFO L87 Difference]: Start difference. First operand 1243 states and 4012 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:21,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:21,683 INFO L93 Difference]: Finished difference Result 1546 states and 4875 transitions. [2022-02-15 13:28:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:28:21,684 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:21,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:21,686 INFO L225 Difference]: With dead ends: 1546 [2022-02-15 13:28:21,686 INFO L226 Difference]: Without dead ends: 1434 [2022-02-15 13:28:21,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:28:21,687 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 73 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:21,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 335 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 599 Invalid, 0 Unknown, 291 Unchecked, 0.2s Time] [2022-02-15 13:28:21,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2022-02-15 13:28:21,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1244. [2022-02-15 13:28:21,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 3.236524537409493) internal successors, (4023), 1243 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:21,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4023 transitions. [2022-02-15 13:28:21,702 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4023 transitions. Word has length 24 [2022-02-15 13:28:21,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:21,702 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 4023 transitions. [2022-02-15 13:28:21,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:21,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4023 transitions. [2022-02-15 13:28:21,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:21,704 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:21,704 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:21,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:21,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:21,915 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:21,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:21,916 INFO L85 PathProgramCache]: Analyzing trace with hash 833524537, now seen corresponding path program 82 times [2022-02-15 13:28:21,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:21,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182537838] [2022-02-15 13:28:21,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:21,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:28:22,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:22,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182537838] [2022-02-15 13:28:22,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182537838] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:22,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246069269] [2022-02-15 13:28:22,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:28:22,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:22,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:22,138 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) [2022-02-15 13:28:22,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-15 13:28:22,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:28:22,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:22,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:28:22,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:22,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:22,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:28:22,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:22,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:28:22,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-15 13:28:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:28:22,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:23,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:23,146 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 78 treesize of output 70 [2022-02-15 13:28:23,285 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:23,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-15 13:28:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:28:23,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246069269] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:23,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:23,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:28:23,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155169441] [2022-02-15 13:28:23,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:23,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:28:23,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:23,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:28:23,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:28:23,291 INFO L87 Difference]: Start difference. First operand 1244 states and 4023 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:23,553 INFO L93 Difference]: Finished difference Result 1395 states and 4502 transitions. [2022-02-15 13:28:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:28:23,553 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:23,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:23,556 INFO L225 Difference]: With dead ends: 1395 [2022-02-15 13:28:23,556 INFO L226 Difference]: Without dead ends: 1343 [2022-02-15 13:28:23,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:28:23,556 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:23,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 243 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 509 Invalid, 0 Unknown, 173 Unchecked, 0.2s Time] [2022-02-15 13:28:23,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2022-02-15 13:28:23,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1234. [2022-02-15 13:28:23,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 3.231954582319546) internal successors, (3985), 1233 states have internal predecessors, (3985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 3985 transitions. [2022-02-15 13:28:23,570 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 3985 transitions. Word has length 24 [2022-02-15 13:28:23,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:23,570 INFO L470 AbstractCegarLoop]: Abstraction has 1234 states and 3985 transitions. [2022-02-15 13:28:23,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:23,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 3985 transitions. [2022-02-15 13:28:23,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:23,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:23,572 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:23,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:23,772 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,SelfDestructingSolverStorable97 [2022-02-15 13:28:23,772 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:23,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:23,781 INFO L85 PathProgramCache]: Analyzing trace with hash 79137703, now seen corresponding path program 83 times [2022-02-15 13:28:23,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:23,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287068410] [2022-02-15 13:28:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:23,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:23,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:23,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287068410] [2022-02-15 13:28:23,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287068410] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:23,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338796021] [2022-02-15 13:28:23,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:28:23,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:23,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:23,999 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) [2022-02-15 13:28:24,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-15 13:28:24,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:28:24,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:24,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:28:24,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:24,093 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 41 treesize of output 35 [2022-02-15 13:28:24,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-15 13:28:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:24,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:24,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:24,696 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 51 treesize of output 48 [2022-02-15 13:28:24,742 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:24,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:28:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:24,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338796021] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:24,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:24,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:28:24,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019342198] [2022-02-15 13:28:24,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:24,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:28:24,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:24,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:28:24,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:28:24,747 INFO L87 Difference]: Start difference. First operand 1234 states and 3985 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:26,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:26,608 INFO L93 Difference]: Finished difference Result 2331 states and 7156 transitions. [2022-02-15 13:28:26,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:28:26,608 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:26,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:26,612 INFO L225 Difference]: With dead ends: 2331 [2022-02-15 13:28:26,612 INFO L226 Difference]: Without dead ends: 2173 [2022-02-15 13:28:26,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=315, Invalid=1407, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 13:28:26,613 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 283 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:26,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 463 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:28:26,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2173 states. [2022-02-15 13:28:26,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2173 to 1149. [2022-02-15 13:28:26,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 3.205574912891986) internal successors, (3680), 1148 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:26,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 3680 transitions. [2022-02-15 13:28:26,651 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 3680 transitions. Word has length 24 [2022-02-15 13:28:26,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:26,651 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 3680 transitions. [2022-02-15 13:28:26,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:26,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 3680 transitions. [2022-02-15 13:28:26,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:26,653 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:26,653 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:26,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:26,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:26,867 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:26,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:26,868 INFO L85 PathProgramCache]: Analyzing trace with hash -897088681, now seen corresponding path program 84 times [2022-02-15 13:28:26,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:26,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878027953] [2022-02-15 13:28:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:26,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:27,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:27,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878027953] [2022-02-15 13:28:27,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878027953] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:27,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625829896] [2022-02-15 13:28:27,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:28:27,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:27,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:27,042 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) [2022-02-15 13:28:27,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-15 13:28:27,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:28:27,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:27,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:28:27,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:27,145 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 41 treesize of output 35 [2022-02-15 13:28:27,247 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 43 treesize of output 37 [2022-02-15 13:28:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:27,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:27,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:27,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-02-15 13:28:27,918 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:27,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:28:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:27,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625829896] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:27,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:27,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:28:27,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467721248] [2022-02-15 13:28:27,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:27,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:28:27,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:27,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:28:27,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:28:27,921 INFO L87 Difference]: Start difference. First operand 1149 states and 3680 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:29,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:29,493 INFO L93 Difference]: Finished difference Result 1848 states and 5678 transitions. [2022-02-15 13:28:29,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 13:28:29,494 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:29,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:29,497 INFO L225 Difference]: With dead ends: 1848 [2022-02-15 13:28:29,497 INFO L226 Difference]: Without dead ends: 1727 [2022-02-15 13:28:29,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=404, Invalid=1758, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 13:28:29,498 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 223 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:29,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 433 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1457 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:28:29,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-02-15 13:28:29,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1176. [2022-02-15 13:28:29,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 3.2102127659574466) internal successors, (3772), 1175 states have internal predecessors, (3772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:29,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3772 transitions. [2022-02-15 13:28:29,513 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3772 transitions. Word has length 24 [2022-02-15 13:28:29,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:29,513 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 3772 transitions. [2022-02-15 13:28:29,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:29,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3772 transitions. [2022-02-15 13:28:29,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:29,515 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:29,515 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:29,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:29,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:29,731 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:29,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:29,731 INFO L85 PathProgramCache]: Analyzing trace with hash -356097833, now seen corresponding path program 85 times [2022-02-15 13:28:29,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:29,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081522364] [2022-02-15 13:28:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:29,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:28:29,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:29,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081522364] [2022-02-15 13:28:29,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081522364] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:29,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536386293] [2022-02-15 13:28:29,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:28:29,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:29,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:29,910 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) [2022-02-15 13:28:29,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-15 13:28:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:29,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:28:29,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:30,012 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 41 treesize of output 35 [2022-02-15 13:28:30,145 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 24 treesize of output 20 [2022-02-15 13:28:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:28:30,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:30,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:30,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-15 13:28:30,779 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:30,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-15 13:28:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:28:30,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536386293] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:30,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:30,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:28:30,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692255542] [2022-02-15 13:28:30,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:30,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:28:30,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:30,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:28:30,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:28:30,784 INFO L87 Difference]: Start difference. First operand 1176 states and 3772 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:33,113 INFO L93 Difference]: Finished difference Result 1945 states and 5990 transitions. [2022-02-15 13:28:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 13:28:33,113 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:33,116 INFO L225 Difference]: With dead ends: 1945 [2022-02-15 13:28:33,116 INFO L226 Difference]: Without dead ends: 1837 [2022-02-15 13:28:33,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=489, Invalid=2373, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 13:28:33,117 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 303 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:33,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 404 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:28:33,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2022-02-15 13:28:33,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 1192. [2022-02-15 13:28:33,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 3.209068010075567) internal successors, (3822), 1191 states have internal predecessors, (3822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:33,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 3822 transitions. [2022-02-15 13:28:33,133 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 3822 transitions. Word has length 24 [2022-02-15 13:28:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:33,133 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 3822 transitions. [2022-02-15 13:28:33,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 3822 transitions. [2022-02-15 13:28:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:33,135 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:33,135 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:33,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:33,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-02-15 13:28:33,350 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:33,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:33,351 INFO L85 PathProgramCache]: Analyzing trace with hash -644517783, now seen corresponding path program 86 times [2022-02-15 13:28:33,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:33,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075342720] [2022-02-15 13:28:33,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:33,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:33,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:33,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075342720] [2022-02-15 13:28:33,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075342720] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:33,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669951598] [2022-02-15 13:28:33,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:28:33,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:33,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:33,484 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) [2022-02-15 13:28:33,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-02-15 13:28:33,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:28:33,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:33,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:28:33,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:33,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:33,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:28:33,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:33,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 41 [2022-02-15 13:28:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:33,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:34,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:34,174 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 79 treesize of output 70 [2022-02-15 13:28:34,266 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:34,266 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 28 treesize of output 25 [2022-02-15 13:28:34,269 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:34,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669951598] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:34,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:34,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:28:34,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492922732] [2022-02-15 13:28:34,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:34,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:28:34,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:34,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:28:34,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:28:34,270 INFO L87 Difference]: Start difference. First operand 1192 states and 3822 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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) [2022-02-15 13:28:34,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:34,935 INFO L93 Difference]: Finished difference Result 1563 states and 4726 transitions. [2022-02-15 13:28:34,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:28:34,935 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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 24 [2022-02-15 13:28:34,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:34,937 INFO L225 Difference]: With dead ends: 1563 [2022-02-15 13:28:34,937 INFO L226 Difference]: Without dead ends: 1438 [2022-02-15 13:28:34,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=1090, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:28:34,938 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 149 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:34,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 372 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 832 Invalid, 0 Unknown, 131 Unchecked, 0.3s Time] [2022-02-15 13:28:34,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2022-02-15 13:28:34,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1199. [2022-02-15 13:28:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 3.209515859766277) internal successors, (3845), 1198 states have internal predecessors, (3845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 3845 transitions. [2022-02-15 13:28:34,954 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 3845 transitions. Word has length 24 [2022-02-15 13:28:34,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:34,954 INFO L470 AbstractCegarLoop]: Abstraction has 1199 states and 3845 transitions. [2022-02-15 13:28:34,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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) [2022-02-15 13:28:34,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 3845 transitions. [2022-02-15 13:28:34,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:34,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:34,956 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:34,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:35,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-02-15 13:28:35,170 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:35,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:35,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1719131341, now seen corresponding path program 87 times [2022-02-15 13:28:35,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:35,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663364129] [2022-02-15 13:28:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:35,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:35,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:35,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663364129] [2022-02-15 13:28:35,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663364129] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:35,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038225643] [2022-02-15 13:28:35,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:28:35,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:35,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:35,297 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) [2022-02-15 13:28:35,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-02-15 13:28:35,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:28:35,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:35,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:28:35,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:35,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:35,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:28:35,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:35,566 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:28:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:35,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:36,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:36,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-02-15 13:28:36,218 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:36,218 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 32 treesize of output 29 [2022-02-15 13:28:36,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:36,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038225643] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:36,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:36,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:28:36,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40410754] [2022-02-15 13:28:36,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:36,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:28:36,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:36,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:28:36,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:28:36,223 INFO L87 Difference]: Start difference. First operand 1199 states and 3845 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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) [2022-02-15 13:28:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:36,862 INFO L93 Difference]: Finished difference Result 1602 states and 4903 transitions. [2022-02-15 13:28:36,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:28:36,862 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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 24 [2022-02-15 13:28:36,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:36,864 INFO L225 Difference]: With dead ends: 1602 [2022-02-15 13:28:36,864 INFO L226 Difference]: Without dead ends: 1451 [2022-02-15 13:28:36,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:28:36,865 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 126 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:36,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 271 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 603 Invalid, 0 Unknown, 350 Unchecked, 0.2s Time] [2022-02-15 13:28:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-02-15 13:28:36,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1199. [2022-02-15 13:28:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 3.209515859766277) internal successors, (3845), 1198 states have internal predecessors, (3845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:36,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 3845 transitions. [2022-02-15 13:28:36,880 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 3845 transitions. Word has length 24 [2022-02-15 13:28:36,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:36,881 INFO L470 AbstractCegarLoop]: Abstraction has 1199 states and 3845 transitions. [2022-02-15 13:28:36,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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) [2022-02-15 13:28:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 3845 transitions. [2022-02-15 13:28:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:36,882 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:36,882 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:36,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:37,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:37,099 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:37,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:37,099 INFO L85 PathProgramCache]: Analyzing trace with hash -360844699, now seen corresponding path program 88 times [2022-02-15 13:28:37,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:37,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530992297] [2022-02-15 13:28:37,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:37,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:37,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:37,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530992297] [2022-02-15 13:28:37,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530992297] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:37,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750801325] [2022-02-15 13:28:37,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:28:37,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:37,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:37,318 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) [2022-02-15 13:28:37,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-02-15 13:28:37,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:28:37,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:37,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:28:37,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:37,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:37,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:28:37,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:37,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:28:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:37,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:38,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:38,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 99 [2022-02-15 13:28:38,459 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:38,459 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 32 treesize of output 29 [2022-02-15 13:28:38,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:38,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750801325] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:38,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:38,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:28:38,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107313298] [2022-02-15 13:28:38,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:38,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:28:38,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:38,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:28:38,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:28:38,464 INFO L87 Difference]: Start difference. First operand 1199 states and 3845 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:39,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:39,503 INFO L93 Difference]: Finished difference Result 2275 states and 6663 transitions. [2022-02-15 13:28:39,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 13:28:39,503 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:39,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:39,506 INFO L225 Difference]: With dead ends: 2275 [2022-02-15 13:28:39,506 INFO L226 Difference]: Without dead ends: 2054 [2022-02-15 13:28:39,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=1592, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 13:28:39,507 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 298 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:39,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 396 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 894 Invalid, 0 Unknown, 398 Unchecked, 0.3s Time] [2022-02-15 13:28:39,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2022-02-15 13:28:39,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1218. [2022-02-15 13:28:39,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 3.2358258011503698) internal successors, (3938), 1217 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:39,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3938 transitions. [2022-02-15 13:28:39,525 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3938 transitions. Word has length 24 [2022-02-15 13:28:39,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:39,525 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 3938 transitions. [2022-02-15 13:28:39,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:39,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3938 transitions. [2022-02-15 13:28:39,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:39,527 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:39,527 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:39,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:39,743 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,SelfDestructingSolverStorable103 [2022-02-15 13:28:39,743 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:39,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:39,743 INFO L85 PathProgramCache]: Analyzing trace with hash 501887889, now seen corresponding path program 89 times [2022-02-15 13:28:39,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:39,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915844401] [2022-02-15 13:28:39,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:39,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:28:40,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:40,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915844401] [2022-02-15 13:28:40,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915844401] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:40,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473016006] [2022-02-15 13:28:40,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:28:40,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:40,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:40,019 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) [2022-02-15 13:28:40,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-02-15 13:28:40,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:28:40,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:40,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:28:40,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:40,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:40,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:28:40,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:40,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 41 [2022-02-15 13:28:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:28:40,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:40,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:40,637 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 72 treesize of output 65 [2022-02-15 13:28:40,755 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:40,755 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 28 treesize of output 25 [2022-02-15 13:28:40,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:28:40,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473016006] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:40,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:40,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:28:40,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931525719] [2022-02-15 13:28:40,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:40,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:28:40,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:40,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:28:40,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:28:40,759 INFO L87 Difference]: Start difference. First operand 1218 states and 3938 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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) [2022-02-15 13:28:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:41,178 INFO L93 Difference]: Finished difference Result 1343 states and 4289 transitions. [2022-02-15 13:28:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:28:41,179 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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 24 [2022-02-15 13:28:41,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:41,181 INFO L225 Difference]: With dead ends: 1343 [2022-02-15 13:28:41,181 INFO L226 Difference]: Without dead ends: 1324 [2022-02-15 13:28:41,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:28:41,181 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 67 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:41,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 223 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 623 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2022-02-15 13:28:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-02-15 13:28:41,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1218. [2022-02-15 13:28:41,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 3.2358258011503698) internal successors, (3938), 1217 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:41,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3938 transitions. [2022-02-15 13:28:41,198 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3938 transitions. Word has length 24 [2022-02-15 13:28:41,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:41,198 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 3938 transitions. [2022-02-15 13:28:41,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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) [2022-02-15 13:28:41,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3938 transitions. [2022-02-15 13:28:41,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:41,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:41,200 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:41,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:41,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-02-15 13:28:41,416 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:41,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:41,416 INFO L85 PathProgramCache]: Analyzing trace with hash 773714397, now seen corresponding path program 90 times [2022-02-15 13:28:41,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:41,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225893300] [2022-02-15 13:28:41,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:41,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:41,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:41,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225893300] [2022-02-15 13:28:41,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225893300] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:41,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646520639] [2022-02-15 13:28:41,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:28:41,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:41,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:41,635 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) [2022-02-15 13:28:41,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-02-15 13:28:41,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:28:41,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:41,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:28:41,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:41,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:41,780 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:28:41,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:41,823 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:28:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:41,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:42,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:42,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-02-15 13:28:42,404 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:42,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:28:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:42,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646520639] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:42,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:42,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:28:42,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863526038] [2022-02-15 13:28:42,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:42,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:28:42,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:42,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:28:42,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:28:42,408 INFO L87 Difference]: Start difference. First operand 1218 states and 3938 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:42,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:42,808 INFO L93 Difference]: Finished difference Result 1527 states and 4825 transitions. [2022-02-15 13:28:42,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:28:42,808 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:42,811 INFO L225 Difference]: With dead ends: 1527 [2022-02-15 13:28:42,811 INFO L226 Difference]: Without dead ends: 1430 [2022-02-15 13:28:42,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:28:42,812 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 119 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:42,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 252 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 627 Invalid, 0 Unknown, 107 Unchecked, 0.2s Time] [2022-02-15 13:28:42,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-02-15 13:28:42,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1219. [2022-02-15 13:28:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 3.2364532019704435) internal successors, (3942), 1218 states have internal predecessors, (3942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:42,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 3942 transitions. [2022-02-15 13:28:42,829 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 3942 transitions. Word has length 24 [2022-02-15 13:28:42,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:42,829 INFO L470 AbstractCegarLoop]: Abstraction has 1219 states and 3942 transitions. [2022-02-15 13:28:42,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:42,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 3942 transitions. [2022-02-15 13:28:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:42,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:42,831 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:42,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:43,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-02-15 13:28:43,038 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:43,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:43,039 INFO L85 PathProgramCache]: Analyzing trace with hash -685763075, now seen corresponding path program 91 times [2022-02-15 13:28:43,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:43,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685319713] [2022-02-15 13:28:43,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:43,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:43,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:43,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685319713] [2022-02-15 13:28:43,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685319713] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:43,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599246571] [2022-02-15 13:28:43,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:28:43,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:43,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:43,168 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) [2022-02-15 13:28:43,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-02-15 13:28:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:43,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:28:43,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:43,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:43,306 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:28:43,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:43,394 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:28:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:43,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:43,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:43,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:28:43,961 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:43,961 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 28 treesize of output 25 [2022-02-15 13:28:43,965 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:43,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599246571] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:43,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:43,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:28:43,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110327012] [2022-02-15 13:28:43,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:43,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:28:43,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:43,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:28:43,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:28:43,966 INFO L87 Difference]: Start difference. First operand 1219 states and 3942 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:44,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:44,263 INFO L93 Difference]: Finished difference Result 1373 states and 4360 transitions. [2022-02-15 13:28:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:28:44,263 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:44,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:44,266 INFO L225 Difference]: With dead ends: 1373 [2022-02-15 13:28:44,266 INFO L226 Difference]: Without dead ends: 1342 [2022-02-15 13:28:44,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:28:44,271 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:44,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 247 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 544 Invalid, 0 Unknown, 226 Unchecked, 0.2s Time] [2022-02-15 13:28:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2022-02-15 13:28:44,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1218. [2022-02-15 13:28:44,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 3.2358258011503698) internal successors, (3938), 1217 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:44,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3938 transitions. [2022-02-15 13:28:44,285 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3938 transitions. Word has length 24 [2022-02-15 13:28:44,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:44,286 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 3938 transitions. [2022-02-15 13:28:44,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:44,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3938 transitions. [2022-02-15 13:28:44,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:44,287 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:44,287 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:44,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:44,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:44,490 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:44,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:44,491 INFO L85 PathProgramCache]: Analyzing trace with hash 402890635, now seen corresponding path program 92 times [2022-02-15 13:28:44,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:44,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631120377] [2022-02-15 13:28:44,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:44,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:44,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:44,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631120377] [2022-02-15 13:28:44,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631120377] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:44,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9669151] [2022-02-15 13:28:44,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:28:44,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:44,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:44,648 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) [2022-02-15 13:28:44,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-02-15 13:28:44,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:28:44,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:44,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:28:44,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:44,809 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 26 treesize of output 20 [2022-02-15 13:28:44,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:28:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:44,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:45,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:45,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-02-15 13:28:45,491 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:45,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:28:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:45,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9669151] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:45,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:45,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:28:45,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129355178] [2022-02-15 13:28:45,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:45,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:28:45,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:45,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:28:45,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:28:45,498 INFO L87 Difference]: Start difference. First operand 1218 states and 3938 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 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) [2022-02-15 13:28:45,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:45,893 INFO L93 Difference]: Finished difference Result 1592 states and 5089 transitions. [2022-02-15 13:28:45,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:28:45,893 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 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 24 [2022-02-15 13:28:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:45,896 INFO L225 Difference]: With dead ends: 1592 [2022-02-15 13:28:45,896 INFO L226 Difference]: Without dead ends: 1509 [2022-02-15 13:28:45,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:28:45,896 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 87 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:45,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 266 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 773 Invalid, 0 Unknown, 75 Unchecked, 0.3s Time] [2022-02-15 13:28:45,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2022-02-15 13:28:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1236. [2022-02-15 13:28:45,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 3.2331983805668014) internal successors, (3993), 1235 states have internal predecessors, (3993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3993 transitions. [2022-02-15 13:28:45,937 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3993 transitions. Word has length 24 [2022-02-15 13:28:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:45,937 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 3993 transitions. [2022-02-15 13:28:45,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 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) [2022-02-15 13:28:45,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3993 transitions. [2022-02-15 13:28:45,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:45,939 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:45,939 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:45,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-02-15 13:28:46,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:46,155 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:46,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:46,155 INFO L85 PathProgramCache]: Analyzing trace with hash -2041051857, now seen corresponding path program 93 times [2022-02-15 13:28:46,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:46,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591211075] [2022-02-15 13:28:46,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:46,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:46,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:46,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591211075] [2022-02-15 13:28:46,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591211075] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:46,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968711088] [2022-02-15 13:28:46,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:28:46,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:46,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:46,312 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) [2022-02-15 13:28:46,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-02-15 13:28:46,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:28:46,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:46,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:28:46,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:46,459 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 26 treesize of output 20 [2022-02-15 13:28:46,571 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 30 treesize of output 24 [2022-02-15 13:28:46,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:46,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:47,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:47,170 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 141 treesize of output 121 [2022-02-15 13:28:47,381 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:47,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:28:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:47,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968711088] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:47,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:47,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-15 13:28:47,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787937033] [2022-02-15 13:28:47,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:47,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:28:47,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:47,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:28:47,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:28:47,387 INFO L87 Difference]: Start difference. First operand 1236 states and 3993 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2022-02-15 13:28:47,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:47,610 INFO L93 Difference]: Finished difference Result 1429 states and 4573 transitions. [2022-02-15 13:28:47,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:28:47,610 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 24 [2022-02-15 13:28:47,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:47,612 INFO L225 Difference]: With dead ends: 1429 [2022-02-15 13:28:47,613 INFO L226 Difference]: Without dead ends: 1398 [2022-02-15 13:28:47,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:28:47,613 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 63 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:47,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 203 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 494 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-02-15 13:28:47,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2022-02-15 13:28:47,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1232. [2022-02-15 13:28:47,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 3.233143785540211) internal successors, (3980), 1231 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 3980 transitions. [2022-02-15 13:28:47,626 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 3980 transitions. Word has length 24 [2022-02-15 13:28:47,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:47,627 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 3980 transitions. [2022-02-15 13:28:47,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2022-02-15 13:28:47,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 3980 transitions. [2022-02-15 13:28:47,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:47,628 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:47,628 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:47,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-02-15 13:28:47,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:47,843 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:47,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:47,844 INFO L85 PathProgramCache]: Analyzing trace with hash -798285929, now seen corresponding path program 94 times [2022-02-15 13:28:47,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:47,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229282837] [2022-02-15 13:28:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:47,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:48,052 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:48,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229282837] [2022-02-15 13:28:48,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229282837] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:48,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525395958] [2022-02-15 13:28:48,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:28:48,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:48,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:48,053 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) [2022-02-15 13:28:48,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-02-15 13:28:48,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:28:48,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:48,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:28:48,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:48,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:28:48,295 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 30 treesize of output 24 [2022-02-15 13:28:48,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:48,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:48,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:48,919 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 110 treesize of output 98 [2022-02-15 13:28:49,126 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:49,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-15 13:28:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:49,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525395958] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:49,131 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:49,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:28:49,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187763927] [2022-02-15 13:28:49,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:49,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:28:49,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:49,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:28:49,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:28:49,132 INFO L87 Difference]: Start difference. First operand 1232 states and 3980 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:49,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:49,875 INFO L93 Difference]: Finished difference Result 1695 states and 5462 transitions. [2022-02-15 13:28:49,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:28:49,875 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:49,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:49,878 INFO L225 Difference]: With dead ends: 1695 [2022-02-15 13:28:49,878 INFO L226 Difference]: Without dead ends: 1574 [2022-02-15 13:28:49,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:28:49,878 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 139 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:49,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 270 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 747 Invalid, 0 Unknown, 48 Unchecked, 0.4s Time] [2022-02-15 13:28:49,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2022-02-15 13:28:49,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1280. [2022-02-15 13:28:49,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 3.2462861610633307) internal successors, (4152), 1279 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:49,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 4152 transitions. [2022-02-15 13:28:49,893 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 4152 transitions. Word has length 24 [2022-02-15 13:28:49,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:49,893 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 4152 transitions. [2022-02-15 13:28:49,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:49,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 4152 transitions. [2022-02-15 13:28:49,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:49,895 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:49,895 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:49,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:50,110 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,SelfDestructingSolverStorable109 [2022-02-15 13:28:50,110 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:50,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:50,111 INFO L85 PathProgramCache]: Analyzing trace with hash 805596883, now seen corresponding path program 95 times [2022-02-15 13:28:50,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:50,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732406343] [2022-02-15 13:28:50,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:50,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:50,301 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:50,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:50,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732406343] [2022-02-15 13:28:50,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732406343] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:50,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190736763] [2022-02-15 13:28:50,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:28:50,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:50,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:50,303 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) [2022-02-15 13:28:50,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-02-15 13:28:50,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:28:50,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:50,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:28:50,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:50,497 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 26 treesize of output 20 [2022-02-15 13:28:50,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:28:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:50,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:51,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:51,337 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 141 treesize of output 121 [2022-02-15 13:28:51,499 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:51,500 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 28 treesize of output 25 [2022-02-15 13:28:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:51,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190736763] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:51,505 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:51,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:28:51,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427219064] [2022-02-15 13:28:51,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:51,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:28:51,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:51,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:28:51,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:28:51,505 INFO L87 Difference]: Start difference. First operand 1280 states and 4152 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) [2022-02-15 13:28:51,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:51,812 INFO L93 Difference]: Finished difference Result 1502 states and 4796 transitions. [2022-02-15 13:28:51,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:28:51,812 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 24 [2022-02-15 13:28:51,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:51,814 INFO L225 Difference]: With dead ends: 1502 [2022-02-15 13:28:51,815 INFO L226 Difference]: Without dead ends: 1471 [2022-02-15 13:28:51,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:28:51,815 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 88 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:51,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 217 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 570 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-02-15 13:28:51,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2022-02-15 13:28:51,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1275. [2022-02-15 13:28:51,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1274 states have (on average 3.23861852433281) internal successors, (4126), 1274 states have internal predecessors, (4126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:51,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 4126 transitions. [2022-02-15 13:28:51,829 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 4126 transitions. Word has length 24 [2022-02-15 13:28:51,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:51,829 INFO L470 AbstractCegarLoop]: Abstraction has 1275 states and 4126 transitions. [2022-02-15 13:28:51,829 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) [2022-02-15 13:28:51,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 4126 transitions. [2022-02-15 13:28:51,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:51,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:51,831 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:51,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-02-15 13:28:52,047 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,SelfDestructingSolverStorable110 [2022-02-15 13:28:52,047 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:52,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:52,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1789498481, now seen corresponding path program 96 times [2022-02-15 13:28:52,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:52,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529478468] [2022-02-15 13:28:52,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:52,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:52,153 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:52,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529478468] [2022-02-15 13:28:52,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529478468] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:52,153 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383561353] [2022-02-15 13:28:52,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:28:52,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:52,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:52,155 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) [2022-02-15 13:28:52,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-02-15 13:28:52,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:28:52,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:52,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:28:52,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:52,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:28:52,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:28:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:52,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:52,831 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:52,832 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 141 treesize of output 121 [2022-02-15 13:28:53,017 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:53,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:28:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:53,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383561353] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:53,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:53,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-15 13:28:53,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852234199] [2022-02-15 13:28:53,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:53,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:28:53,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:53,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:28:53,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:28:53,022 INFO L87 Difference]: Start difference. First operand 1275 states and 4126 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) [2022-02-15 13:28:53,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:53,580 INFO L93 Difference]: Finished difference Result 1762 states and 5520 transitions. [2022-02-15 13:28:53,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:28:53,580 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 24 [2022-02-15 13:28:53,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:53,583 INFO L225 Difference]: With dead ends: 1762 [2022-02-15 13:28:53,583 INFO L226 Difference]: Without dead ends: 1672 [2022-02-15 13:28:53,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:28:53,584 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 129 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:53,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 260 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:28:53,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2022-02-15 13:28:53,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1310. [2022-02-15 13:28:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 3.2551566080977845) internal successors, (4261), 1309 states have internal predecessors, (4261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 4261 transitions. [2022-02-15 13:28:53,600 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 4261 transitions. Word has length 24 [2022-02-15 13:28:53,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:53,600 INFO L470 AbstractCegarLoop]: Abstraction has 1310 states and 4261 transitions. [2022-02-15 13:28:53,600 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) [2022-02-15 13:28:53,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 4261 transitions. [2022-02-15 13:28:53,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:53,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:53,602 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:53,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-02-15 13:28:53,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-02-15 13:28:53,815 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:53,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:53,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1179511201, now seen corresponding path program 97 times [2022-02-15 13:28:53,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:53,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862665059] [2022-02-15 13:28:53,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:53,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:54,025 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:54,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862665059] [2022-02-15 13:28:54,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862665059] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:54,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335040341] [2022-02-15 13:28:54,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:28:54,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:54,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:54,027 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) [2022-02-15 13:28:54,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-02-15 13:28:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:54,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:28:54,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:54,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:54,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:28:54,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:54,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 37 [2022-02-15 13:28:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:54,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:54,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:54,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 63 [2022-02-15 13:28:54,983 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:54,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-02-15 13:28:54,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:54,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335040341] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:54,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:54,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:28:54,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461046917] [2022-02-15 13:28:54,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:54,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:28:54,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:54,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:28:54,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:28:54,987 INFO L87 Difference]: Start difference. First operand 1310 states and 4261 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:56,330 INFO L93 Difference]: Finished difference Result 2070 states and 6243 transitions. [2022-02-15 13:28:56,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 13:28:56,330 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:28:56,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:56,333 INFO L225 Difference]: With dead ends: 2070 [2022-02-15 13:28:56,333 INFO L226 Difference]: Without dead ends: 1906 [2022-02-15 13:28:56,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 13:28:56,334 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 224 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:56,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 530 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 983 Invalid, 0 Unknown, 180 Unchecked, 0.3s Time] [2022-02-15 13:28:56,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2022-02-15 13:28:56,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1312. [2022-02-15 13:28:56,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 3.2562929061784898) internal successors, (4269), 1311 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:56,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 4269 transitions. [2022-02-15 13:28:56,353 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 4269 transitions. Word has length 24 [2022-02-15 13:28:56,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:56,353 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 4269 transitions. [2022-02-15 13:28:56,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:56,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 4269 transitions. [2022-02-15 13:28:56,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:56,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:56,356 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:56,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:56,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:56,568 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:56,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:56,569 INFO L85 PathProgramCache]: Analyzing trace with hash -499094101, now seen corresponding path program 98 times [2022-02-15 13:28:56,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:56,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857246785] [2022-02-15 13:28:56,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:56,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:56,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:56,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:56,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857246785] [2022-02-15 13:28:56,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857246785] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:56,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659758687] [2022-02-15 13:28:56,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:28:56,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:56,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:56,750 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) [2022-02-15 13:28:56,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-02-15 13:28:56,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:28:56,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:56,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:28:56,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:56,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:56,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:28:56,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:56,954 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:28:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:57,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:57,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:57,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-02-15 13:28:57,676 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:57,676 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 28 treesize of output 25 [2022-02-15 13:28:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:57,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659758687] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:57,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:57,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:28:57,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840659829] [2022-02-15 13:28:57,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:57,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:28:57,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:57,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:28:57,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:28:57,688 INFO L87 Difference]: Start difference. First operand 1312 states and 4269 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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) [2022-02-15 13:28:57,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:57,939 INFO L93 Difference]: Finished difference Result 1425 states and 4598 transitions. [2022-02-15 13:28:57,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:28:57,940 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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 24 [2022-02-15 13:28:57,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:57,942 INFO L225 Difference]: With dead ends: 1425 [2022-02-15 13:28:57,942 INFO L226 Difference]: Without dead ends: 1406 [2022-02-15 13:28:57,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:28:57,942 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 390 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:57,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 195 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 420 Invalid, 0 Unknown, 390 Unchecked, 0.2s Time] [2022-02-15 13:28:57,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1406 states. [2022-02-15 13:28:57,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1406 to 1312. [2022-02-15 13:28:57,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 3.2562929061784898) internal successors, (4269), 1311 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:57,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 4269 transitions. [2022-02-15 13:28:57,956 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 4269 transitions. Word has length 24 [2022-02-15 13:28:57,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:57,956 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 4269 transitions. [2022-02-15 13:28:57,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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) [2022-02-15 13:28:57,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 4269 transitions. [2022-02-15 13:28:57,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:57,958 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:57,958 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:57,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:58,171 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,SelfDestructingSolverStorable113 [2022-02-15 13:28:58,171 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:58,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:58,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1597519505, now seen corresponding path program 99 times [2022-02-15 13:28:58,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:58,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931463647] [2022-02-15 13:28:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:58,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:58,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:58,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:58,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931463647] [2022-02-15 13:28:58,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931463647] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:58,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547231277] [2022-02-15 13:28:58,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:28:58,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:58,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:58,368 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) [2022-02-15 13:28:58,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-02-15 13:28:58,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:28:58,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:58,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:28:58,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:58,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:58,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:28:58,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:58,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 37 [2022-02-15 13:28:58,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:58,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:28:59,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:28:59,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 41 [2022-02-15 13:28:59,111 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:28:59,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-02-15 13:28:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:59,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547231277] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:28:59,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:28:59,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:28:59,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217363725] [2022-02-15 13:28:59,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:28:59,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:28:59,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:28:59,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:28:59,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:28:59,115 INFO L87 Difference]: Start difference. First operand 1312 states and 4269 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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) [2022-02-15 13:28:59,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:28:59,363 INFO L93 Difference]: Finished difference Result 1465 states and 4717 transitions. [2022-02-15 13:28:59,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:28:59,363 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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 24 [2022-02-15 13:28:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:28:59,366 INFO L225 Difference]: With dead ends: 1465 [2022-02-15 13:28:59,366 INFO L226 Difference]: Without dead ends: 1446 [2022-02-15 13:28:59,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:28:59,366 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:28:59,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 280 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 641 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-02-15 13:28:59,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2022-02-15 13:28:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 1314. [2022-02-15 13:28:59,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 3.257425742574257) internal successors, (4277), 1313 states have internal predecessors, (4277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:28:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 4277 transitions. [2022-02-15 13:28:59,381 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 4277 transitions. Word has length 24 [2022-02-15 13:28:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:28:59,381 INFO L470 AbstractCegarLoop]: Abstraction has 1314 states and 4277 transitions. [2022-02-15 13:28:59,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 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) [2022-02-15 13:28:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 4277 transitions. [2022-02-15 13:28:59,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:28:59,383 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:28:59,383 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:28:59,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-02-15 13:28:59,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-02-15 13:28:59,599 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:28:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:28:59,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1839078163, now seen corresponding path program 100 times [2022-02-15 13:28:59,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:28:59,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846020912] [2022-02-15 13:28:59,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:28:59,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:28:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:28:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:28:59,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:28:59,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846020912] [2022-02-15 13:28:59,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846020912] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:28:59,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631204297] [2022-02-15 13:28:59,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:28:59,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:28:59,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:28:59,768 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) [2022-02-15 13:28:59,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-02-15 13:28:59,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:28:59,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:28:59,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:28:59,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:28:59,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:28:59,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-15 13:29:00,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:00,032 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:29:00,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-15 13:29:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:00,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:00,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:00,437 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 36 treesize of output 38 [2022-02-15 13:29:00,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:00,589 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 86 treesize of output 78 [2022-02-15 13:29:00,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:00,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-02-15 13:29:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:00,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631204297] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:00,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:00,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:00,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87630209] [2022-02-15 13:29:00,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:00,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:00,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:00,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:00,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:00,663 INFO L87 Difference]: Start difference. First operand 1314 states and 4277 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:01,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:01,300 INFO L93 Difference]: Finished difference Result 1714 states and 5372 transitions. [2022-02-15 13:29:01,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:29:01,300 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:29:01,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:01,303 INFO L225 Difference]: With dead ends: 1714 [2022-02-15 13:29:01,303 INFO L226 Difference]: Without dead ends: 1634 [2022-02-15 13:29:01,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:29:01,304 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 110 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:01,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 357 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 994 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2022-02-15 13:29:01,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2022-02-15 13:29:01,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1343. [2022-02-15 13:29:01,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1342 states have (on average 3.2406855439642324) internal successors, (4349), 1342 states have internal predecessors, (4349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 4349 transitions. [2022-02-15 13:29:01,319 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 4349 transitions. Word has length 24 [2022-02-15 13:29:01,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:01,320 INFO L470 AbstractCegarLoop]: Abstraction has 1343 states and 4349 transitions. [2022-02-15 13:29:01,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 4349 transitions. [2022-02-15 13:29:01,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:01,321 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:01,321 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:01,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:01,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:01,537 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:01,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:01,538 INFO L85 PathProgramCache]: Analyzing trace with hash -263182055, now seen corresponding path program 101 times [2022-02-15 13:29:01,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:01,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133576298] [2022-02-15 13:29:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:01,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:01,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:01,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133576298] [2022-02-15 13:29:01,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133576298] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:01,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608669047] [2022-02-15 13:29:01,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:29:01,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:01,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:01,704 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) [2022-02-15 13:29:01,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-02-15 13:29:01,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:29:01,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:01,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:01,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:01,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:01,800 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-15 13:29:01,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:01,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 22 [2022-02-15 13:29:02,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:02,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:02,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:02,326 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 36 treesize of output 38 [2022-02-15 13:29:02,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:02,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-02-15 13:29:02,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:02,457 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 41 treesize of output 38 [2022-02-15 13:29:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:02,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608669047] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:02,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:02,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:29:02,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178441142] [2022-02-15 13:29:02,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:02,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:29:02,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:02,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:29:02,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:29:02,504 INFO L87 Difference]: Start difference. First operand 1343 states and 4349 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) [2022-02-15 13:29:02,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:02,860 INFO L93 Difference]: Finished difference Result 1463 states and 4691 transitions. [2022-02-15 13:29:02,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:29:02,860 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 24 [2022-02-15 13:29:02,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:02,862 INFO L225 Difference]: With dead ends: 1463 [2022-02-15 13:29:02,862 INFO L226 Difference]: Without dead ends: 1404 [2022-02-15 13:29:02,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:29:02,863 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 66 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:02,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 246 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 538 Invalid, 0 Unknown, 112 Unchecked, 0.2s Time] [2022-02-15 13:29:02,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2022-02-15 13:29:02,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1345. [2022-02-15 13:29:02,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 3.238095238095238) internal successors, (4352), 1344 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 4352 transitions. [2022-02-15 13:29:02,877 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 4352 transitions. Word has length 24 [2022-02-15 13:29:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:02,877 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 4352 transitions. [2022-02-15 13:29:02,877 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) [2022-02-15 13:29:02,877 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 4352 transitions. [2022-02-15 13:29:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:02,878 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:02,878 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:02,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:03,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:03,083 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:03,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:03,083 INFO L85 PathProgramCache]: Analyzing trace with hash 900751119, now seen corresponding path program 102 times [2022-02-15 13:29:03,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:03,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142065440] [2022-02-15 13:29:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:03,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:03,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:03,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142065440] [2022-02-15 13:29:03,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142065440] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:03,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519146369] [2022-02-15 13:29:03,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:29:03,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:03,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:03,254 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) [2022-02-15 13:29:03,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-02-15 13:29:03,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:29:03,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:03,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:29:03,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:03,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:03,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-15 13:29:03,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:03,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:29:03,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-15 13:29:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:03,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:03,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:03,986 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 36 treesize of output 38 [2022-02-15 13:29:04,119 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:04,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 78 [2022-02-15 13:29:04,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:04,125 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 70 treesize of output 62 [2022-02-15 13:29:04,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:04,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519146369] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:04,181 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:04,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:04,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634415505] [2022-02-15 13:29:04,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:04,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:04,181 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:04,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:04,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:04,181 INFO L87 Difference]: Start difference. First operand 1345 states and 4352 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:04,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:04,570 INFO L93 Difference]: Finished difference Result 1568 states and 4944 transitions. [2022-02-15 13:29:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:29:04,570 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:29:04,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:04,573 INFO L225 Difference]: With dead ends: 1568 [2022-02-15 13:29:04,573 INFO L226 Difference]: Without dead ends: 1492 [2022-02-15 13:29:04,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:29:04,573 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:04,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 271 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 696 Invalid, 0 Unknown, 109 Unchecked, 0.3s Time] [2022-02-15 13:29:04,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2022-02-15 13:29:04,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1349. [2022-02-15 13:29:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.235905044510386) internal successors, (4362), 1348 states have internal predecessors, (4362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4362 transitions. [2022-02-15 13:29:04,588 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4362 transitions. Word has length 24 [2022-02-15 13:29:04,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:04,588 INFO L470 AbstractCegarLoop]: Abstraction has 1349 states and 4362 transitions. [2022-02-15 13:29:04,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:04,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4362 transitions. [2022-02-15 13:29:04,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:04,589 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:04,590 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:04,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:04,803 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,SelfDestructingSolverStorable117 [2022-02-15 13:29:04,803 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:04,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:04,804 INFO L85 PathProgramCache]: Analyzing trace with hash -263691145, now seen corresponding path program 103 times [2022-02-15 13:29:04,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:04,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080157746] [2022-02-15 13:29:04,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:04,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:04,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:04,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080157746] [2022-02-15 13:29:04,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080157746] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:04,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600101499] [2022-02-15 13:29:04,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:29:04,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:04,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:04,945 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) [2022-02-15 13:29:04,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-02-15 13:29:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:04,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:04,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:05,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:05,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 39 [2022-02-15 13:29:05,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:05,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 41 [2022-02-15 13:29:05,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-15 13:29:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:05,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:05,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:05,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-02-15 13:29:05,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:05,623 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 126 treesize of output 110 [2022-02-15 13:29:05,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:05,627 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 102 treesize of output 86 [2022-02-15 13:29:05,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:05,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600101499] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:05,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:05,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:05,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242259681] [2022-02-15 13:29:05,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:05,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:05,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:05,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:05,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:05,689 INFO L87 Difference]: Start difference. First operand 1349 states and 4362 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:06,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:06,050 INFO L93 Difference]: Finished difference Result 1611 states and 5134 transitions. [2022-02-15 13:29:06,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:29:06,050 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:29:06,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:06,053 INFO L225 Difference]: With dead ends: 1611 [2022-02-15 13:29:06,053 INFO L226 Difference]: Without dead ends: 1576 [2022-02-15 13:29:06,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:29:06,053 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 100 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:06,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 182 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 541 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-02-15 13:29:06,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-02-15 13:29:06,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1349. [2022-02-15 13:29:06,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.234421364985163) internal successors, (4360), 1348 states have internal predecessors, (4360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4360 transitions. [2022-02-15 13:29:06,069 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4360 transitions. Word has length 24 [2022-02-15 13:29:06,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:06,069 INFO L470 AbstractCegarLoop]: Abstraction has 1349 states and 4360 transitions. [2022-02-15 13:29:06,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:06,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4360 transitions. [2022-02-15 13:29:06,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:06,071 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:06,071 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:06,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:06,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:06,287 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:06,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:06,287 INFO L85 PathProgramCache]: Analyzing trace with hash -2022472717, now seen corresponding path program 104 times [2022-02-15 13:29:06,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:06,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604305320] [2022-02-15 13:29:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:06,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:06,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:06,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604305320] [2022-02-15 13:29:06,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604305320] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:06,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709977504] [2022-02-15 13:29:06,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:29:06,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:06,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:06,412 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) [2022-02-15 13:29:06,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-02-15 13:29:06,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:29:06,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:06,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:06,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:06,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:06,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 treesize of output 33 [2022-02-15 13:29:06,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:06,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:29:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:06,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:06,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:06,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 57 [2022-02-15 13:29:07,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:07,009 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 58 treesize of output 55 [2022-02-15 13:29:07,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:07,013 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 46 treesize of output 43 [2022-02-15 13:29:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:07,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709977504] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:07,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:07,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:07,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639198697] [2022-02-15 13:29:07,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:07,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:07,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:07,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:07,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:07,057 INFO L87 Difference]: Start difference. First operand 1349 states and 4360 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:07,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:07,412 INFO L93 Difference]: Finished difference Result 1459 states and 4671 transitions. [2022-02-15 13:29:07,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:29:07,412 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:29:07,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:07,414 INFO L225 Difference]: With dead ends: 1459 [2022-02-15 13:29:07,414 INFO L226 Difference]: Without dead ends: 1400 [2022-02-15 13:29:07,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:29:07,415 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 75 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:07,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 239 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 694 Invalid, 0 Unknown, 287 Unchecked, 0.2s Time] [2022-02-15 13:29:07,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-02-15 13:29:07,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1352. [2022-02-15 13:29:07,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.233900814211695) internal successors, (4369), 1351 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:07,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4369 transitions. [2022-02-15 13:29:07,429 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4369 transitions. Word has length 24 [2022-02-15 13:29:07,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:07,429 INFO L470 AbstractCegarLoop]: Abstraction has 1352 states and 4369 transitions. [2022-02-15 13:29:07,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:07,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4369 transitions. [2022-02-15 13:29:07,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:07,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:07,431 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:07,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:07,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:07,643 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:07,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:07,644 INFO L85 PathProgramCache]: Analyzing trace with hash -858539543, now seen corresponding path program 105 times [2022-02-15 13:29:07,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:07,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250293074] [2022-02-15 13:29:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:07,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:07,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:07,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250293074] [2022-02-15 13:29:07,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250293074] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:07,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526100841] [2022-02-15 13:29:07,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:29:07,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:07,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:07,813 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) [2022-02-15 13:29:07,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-02-15 13:29:07,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:29:07,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:07,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:29:07,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:07,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:07,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 39 [2022-02-15 13:29:08,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:08,050 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:29:08,053 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 10 treesize of output 6 [2022-02-15 13:29:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:08,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:08,672 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:08,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 61 [2022-02-15 13:29:08,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:08,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 73 [2022-02-15 13:29:08,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:08,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 57 [2022-02-15 13:29:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:08,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526100841] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:08,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:08,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:08,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695593671] [2022-02-15 13:29:08,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:08,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:08,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:08,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:08,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:08,921 INFO L87 Difference]: Start difference. First operand 1352 states and 4369 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:09,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:09,566 INFO L93 Difference]: Finished difference Result 1649 states and 5174 transitions. [2022-02-15 13:29:09,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:29:09,566 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:29:09,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:09,569 INFO L225 Difference]: With dead ends: 1649 [2022-02-15 13:29:09,569 INFO L226 Difference]: Without dead ends: 1573 [2022-02-15 13:29:09,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:29:09,569 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 91 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:09,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 289 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1002 Invalid, 0 Unknown, 23 Unchecked, 0.4s Time] [2022-02-15 13:29:09,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2022-02-15 13:29:09,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1359. [2022-02-15 13:29:09,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 3.2297496318114876) internal successors, (4386), 1358 states have internal predecessors, (4386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:09,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 4386 transitions. [2022-02-15 13:29:09,585 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 4386 transitions. Word has length 24 [2022-02-15 13:29:09,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:09,585 INFO L470 AbstractCegarLoop]: Abstraction has 1359 states and 4386 transitions. [2022-02-15 13:29:09,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:09,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 4386 transitions. [2022-02-15 13:29:09,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:09,587 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:09,587 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:09,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:09,799 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,SelfDestructingSolverStorable120 [2022-02-15 13:29:09,799 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:09,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:09,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2022981807, now seen corresponding path program 106 times [2022-02-15 13:29:09,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:09,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946470885] [2022-02-15 13:29:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:09,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:09,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:09,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946470885] [2022-02-15 13:29:09,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946470885] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:09,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789585948] [2022-02-15 13:29:09,973 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:29:09,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:09,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:09,974 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) [2022-02-15 13:29:09,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-02-15 13:29:10,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:29:10,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:10,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:10,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:10,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:10,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-15 13:29:10,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:10,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:29:10,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-15 13:29:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:10,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:10,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:10,588 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 77 treesize of output 75 [2022-02-15 13:29:10,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:10,849 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 123 treesize of output 107 [2022-02-15 13:29:10,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:10,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-02-15 13:29:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:10,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789585948] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:10,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:10,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:10,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996117725] [2022-02-15 13:29:10,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:10,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:10,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:10,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:10,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:10,963 INFO L87 Difference]: Start difference. First operand 1359 states and 4386 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:11,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:11,368 INFO L93 Difference]: Finished difference Result 1451 states and 4657 transitions. [2022-02-15 13:29:11,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:29:11,368 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:29:11,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:11,370 INFO L225 Difference]: With dead ends: 1451 [2022-02-15 13:29:11,370 INFO L226 Difference]: Without dead ends: 1416 [2022-02-15 13:29:11,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:29:11,371 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:11,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 193 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 521 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-02-15 13:29:11,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1416 states. [2022-02-15 13:29:11,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1416 to 1355. [2022-02-15 13:29:11,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 3.2333825701624814) internal successors, (4378), 1354 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:11,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 4378 transitions. [2022-02-15 13:29:11,402 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 4378 transitions. Word has length 24 [2022-02-15 13:29:11,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:11,402 INFO L470 AbstractCegarLoop]: Abstraction has 1355 states and 4378 transitions. [2022-02-15 13:29:11,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 4378 transitions. [2022-02-15 13:29:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:11,404 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:11,404 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:11,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-02-15 13:29:11,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:11,620 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:11,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:11,620 INFO L85 PathProgramCache]: Analyzing trace with hash 617078035, now seen corresponding path program 107 times [2022-02-15 13:29:11,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:11,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001854256] [2022-02-15 13:29:11,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:11,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:11,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:11,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001854256] [2022-02-15 13:29:11,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001854256] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:11,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144823056] [2022-02-15 13:29:11,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:29:11,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:11,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:11,787 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) [2022-02-15 13:29:11,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-02-15 13:29:11,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:29:11,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:11,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:11,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:11,906 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 29 treesize of output 23 [2022-02-15 13:29:11,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:11,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 13:29:11,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:11,935 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2022-02-15 13:29:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:12,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:12,367 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:12,367 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 77 treesize of output 75 [2022-02-15 13:29:12,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:12,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-02-15 13:29:12,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:12,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-02-15 13:29:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:12,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144823056] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:12,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:12,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:12,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521057606] [2022-02-15 13:29:12,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:12,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:12,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:12,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:12,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:12,797 INFO L87 Difference]: Start difference. First operand 1355 states and 4378 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:13,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:13,345 INFO L93 Difference]: Finished difference Result 1544 states and 4875 transitions. [2022-02-15 13:29:13,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:29:13,345 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:29:13,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:13,348 INFO L225 Difference]: With dead ends: 1544 [2022-02-15 13:29:13,348 INFO L226 Difference]: Without dead ends: 1435 [2022-02-15 13:29:13,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:29:13,348 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 115 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:13,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 203 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 668 Invalid, 0 Unknown, 95 Unchecked, 0.3s Time] [2022-02-15 13:29:13,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2022-02-15 13:29:13,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1358. [2022-02-15 13:29:13,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 1357 states have (on average 3.2336035372144436) internal successors, (4388), 1357 states have internal predecessors, (4388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:13,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 4388 transitions. [2022-02-15 13:29:13,363 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 4388 transitions. Word has length 24 [2022-02-15 13:29:13,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:13,363 INFO L470 AbstractCegarLoop]: Abstraction has 1358 states and 4388 transitions. [2022-02-15 13:29:13,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:13,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 4388 transitions. [2022-02-15 13:29:13,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:13,365 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:13,365 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:13,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:13,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-02-15 13:29:13,581 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:13,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:13,581 INFO L85 PathProgramCache]: Analyzing trace with hash 2003695823, now seen corresponding path program 108 times [2022-02-15 13:29:13,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:13,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144108002] [2022-02-15 13:29:13,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:13,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:13,749 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:13,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144108002] [2022-02-15 13:29:13,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144108002] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:13,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193744860] [2022-02-15 13:29:13,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:29:13,749 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:13,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:13,750 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) [2022-02-15 13:29:13,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-02-15 13:29:13,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:29:13,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:13,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:13,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:13,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:13,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:29:13,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:13,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 22 [2022-02-15 13:29:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:14,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:14,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:14,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 53 [2022-02-15 13:29:14,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:14,517 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 53 treesize of output 50 [2022-02-15 13:29:14,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:14,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2022-02-15 13:29:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:14,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193744860] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:14,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:14,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:29:14,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750343535] [2022-02-15 13:29:14,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:14,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:29:14,571 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:14,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:29:14,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:29:14,572 INFO L87 Difference]: Start difference. First operand 1358 states and 4388 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) [2022-02-15 13:29:14,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:14,890 INFO L93 Difference]: Finished difference Result 1689 states and 5288 transitions. [2022-02-15 13:29:14,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:29:14,891 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 24 [2022-02-15 13:29:14,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:14,893 INFO L225 Difference]: With dead ends: 1689 [2022-02-15 13:29:14,893 INFO L226 Difference]: Without dead ends: 1616 [2022-02-15 13:29:14,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:29:14,894 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 127 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:14,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 341 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 716 Invalid, 0 Unknown, 282 Unchecked, 0.2s Time] [2022-02-15 13:29:14,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-02-15 13:29:14,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1361. [2022-02-15 13:29:14,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1361 states, 1360 states have (on average 3.2316176470588234) internal successors, (4395), 1360 states have internal predecessors, (4395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:14,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1361 states to 1361 states and 4395 transitions. [2022-02-15 13:29:14,909 INFO L78 Accepts]: Start accepts. Automaton has 1361 states and 4395 transitions. Word has length 24 [2022-02-15 13:29:14,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:14,909 INFO L470 AbstractCegarLoop]: Abstraction has 1361 states and 4395 transitions. [2022-02-15 13:29:14,909 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) [2022-02-15 13:29:14,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1361 states and 4395 transitions. [2022-02-15 13:29:14,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:14,911 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:14,911 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:14,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-02-15 13:29:15,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:15,116 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:15,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:15,116 INFO L85 PathProgramCache]: Analyzing trace with hash -98564395, now seen corresponding path program 109 times [2022-02-15 13:29:15,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:15,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771036236] [2022-02-15 13:29:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:15,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:15,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:15,295 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:15,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771036236] [2022-02-15 13:29:15,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771036236] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:15,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13118798] [2022-02-15 13:29:15,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:29:15,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:15,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:15,297 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) [2022-02-15 13:29:15,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-02-15 13:29:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:15,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:29:15,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:15,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:29:15,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:29:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:15,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:15,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:15,852 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 53 treesize of output 51 [2022-02-15 13:29:15,903 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:15,904 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 73 [2022-02-15 13:29:15,907 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:15,907 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 65 treesize of output 57 [2022-02-15 13:29:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:15,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13118798] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:15,958 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:15,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:29:15,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272530185] [2022-02-15 13:29:15,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:15,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:29:15,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:15,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:29:15,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:29:15,959 INFO L87 Difference]: Start difference. First operand 1361 states and 4395 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:17,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:17,149 INFO L93 Difference]: Finished difference Result 2202 states and 6754 transitions. [2022-02-15 13:29:17,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 13:29:17,149 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:29:17,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:17,153 INFO L225 Difference]: With dead ends: 2202 [2022-02-15 13:29:17,153 INFO L226 Difference]: Without dead ends: 2081 [2022-02-15 13:29:17,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=340, Invalid=1730, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 13:29:17,153 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 196 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:17,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 315 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:29:17,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2081 states. [2022-02-15 13:29:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2081 to 1408. [2022-02-15 13:29:17,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 3.230277185501066) internal successors, (4545), 1407 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:17,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4545 transitions. [2022-02-15 13:29:17,173 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4545 transitions. Word has length 24 [2022-02-15 13:29:17,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:17,173 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 4545 transitions. [2022-02-15 13:29:17,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:17,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4545 transitions. [2022-02-15 13:29:17,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:17,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:17,188 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:17,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:17,407 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,SelfDestructingSolverStorable124 [2022-02-15 13:29:17,408 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:17,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:17,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1065368779, now seen corresponding path program 110 times [2022-02-15 13:29:17,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:17,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102534562] [2022-02-15 13:29:17,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:17,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:17,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:17,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102534562] [2022-02-15 13:29:17,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102534562] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:17,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516224214] [2022-02-15 13:29:17,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:29:17,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:17,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:17,593 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) [2022-02-15 13:29:17,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-02-15 13:29:17,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:29:17,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:17,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:17,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:17,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:17,669 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:29:17,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:17,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:29:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:17,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:18,550 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:18,550 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 55 treesize of output 53 [2022-02-15 13:29:18,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:18,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-02-15 13:29:18,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:18,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2022-02-15 13:29:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:18,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516224214] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:18,716 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:18,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:18,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115686858] [2022-02-15 13:29:18,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:18,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:18,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:18,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:18,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:18,717 INFO L87 Difference]: Start difference. First operand 1408 states and 4545 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:19,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:19,577 INFO L93 Difference]: Finished difference Result 1702 states and 5281 transitions. [2022-02-15 13:29:19,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:29:19,578 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:29:19,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:19,581 INFO L225 Difference]: With dead ends: 1702 [2022-02-15 13:29:19,581 INFO L226 Difference]: Without dead ends: 1622 [2022-02-15 13:29:19,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:29:19,581 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 114 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:19,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 410 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 797 Invalid, 0 Unknown, 116 Unchecked, 0.3s Time] [2022-02-15 13:29:19,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2022-02-15 13:29:19,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1410. [2022-02-15 13:29:19,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.227821149751597) internal successors, (4548), 1409 states have internal predecessors, (4548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:19,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4548 transitions. [2022-02-15 13:29:19,600 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4548 transitions. Word has length 24 [2022-02-15 13:29:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:19,600 INFO L470 AbstractCegarLoop]: Abstraction has 1410 states and 4548 transitions. [2022-02-15 13:29:19,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:19,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4548 transitions. [2022-02-15 13:29:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:19,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:19,602 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:19,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-02-15 13:29:19,815 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,SelfDestructingSolverStorable125 [2022-02-15 13:29:19,816 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:19,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:19,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1316129901, now seen corresponding path program 111 times [2022-02-15 13:29:19,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:19,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466244259] [2022-02-15 13:29:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:19,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:19,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:19,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466244259] [2022-02-15 13:29:19,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466244259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:19,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683504605] [2022-02-15 13:29:19,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:29:19,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:19,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:19,999 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) [2022-02-15 13:29:20,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-02-15 13:29:20,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:29:20,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:20,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:20,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:20,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:20,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:29:20,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:29:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:20,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:20,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:20,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-02-15 13:29:20,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:20,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-02-15 13:29:20,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:20,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-02-15 13:29:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:20,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683504605] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:20,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:20,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-15 13:29:20,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618733227] [2022-02-15 13:29:20,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:20,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:29:20,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:20,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:29:20,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:29:20,872 INFO L87 Difference]: Start difference. First operand 1410 states and 4548 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) [2022-02-15 13:29:21,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:21,245 INFO L93 Difference]: Finished difference Result 1731 states and 5441 transitions. [2022-02-15 13:29:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:29:21,246 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 24 [2022-02-15 13:29:21,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:21,249 INFO L225 Difference]: With dead ends: 1731 [2022-02-15 13:29:21,249 INFO L226 Difference]: Without dead ends: 1700 [2022-02-15 13:29:21,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:29:21,249 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 103 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:21,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 313 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 729 Invalid, 0 Unknown, 82 Unchecked, 0.3s Time] [2022-02-15 13:29:21,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1700 states. [2022-02-15 13:29:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1700 to 1413. [2022-02-15 13:29:21,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 3.2287535410764874) internal successors, (4559), 1412 states have internal predecessors, (4559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:21,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 4559 transitions. [2022-02-15 13:29:21,266 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 4559 transitions. Word has length 24 [2022-02-15 13:29:21,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:21,266 INFO L470 AbstractCegarLoop]: Abstraction has 1413 states and 4559 transitions. [2022-02-15 13:29:21,266 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) [2022-02-15 13:29:21,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 4559 transitions. [2022-02-15 13:29:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:21,268 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:21,268 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:21,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-02-15 13:29:21,468 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,SelfDestructingSolverStorable126 [2022-02-15 13:29:21,469 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:21,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:21,469 INFO L85 PathProgramCache]: Analyzing trace with hash 61317007, now seen corresponding path program 112 times [2022-02-15 13:29:21,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:21,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511395015] [2022-02-15 13:29:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:21,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:21,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:21,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511395015] [2022-02-15 13:29:21,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511395015] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:21,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300840434] [2022-02-15 13:29:21,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:29:21,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:21,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:21,566 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) [2022-02-15 13:29:21,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-02-15 13:29:21,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:29:21,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:21,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:29:21,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:21,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:29:21,860 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 29 treesize of output 23 [2022-02-15 13:29:21,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-02-15 13:29:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:21,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:22,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:22,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 51 [2022-02-15 13:29:22,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:22,409 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 86 treesize of output 78 [2022-02-15 13:29:22,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:22,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-02-15 13:29:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:22,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300840434] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:22,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:22,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:22,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633195172] [2022-02-15 13:29:22,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:22,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:22,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:22,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:22,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:22,456 INFO L87 Difference]: Start difference. First operand 1413 states and 4559 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:23,129 INFO L93 Difference]: Finished difference Result 2139 states and 6587 transitions. [2022-02-15 13:29:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:29:23,129 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:29:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:23,132 INFO L225 Difference]: With dead ends: 2139 [2022-02-15 13:29:23,132 INFO L226 Difference]: Without dead ends: 1966 [2022-02-15 13:29:23,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:29:23,133 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 204 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:23,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 275 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:29:23,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2022-02-15 13:29:23,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1423. [2022-02-15 13:29:23,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 3.228551336146273) internal successors, (4591), 1422 states have internal predecessors, (4591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:23,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4591 transitions. [2022-02-15 13:29:23,167 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4591 transitions. Word has length 24 [2022-02-15 13:29:23,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:23,168 INFO L470 AbstractCegarLoop]: Abstraction has 1423 states and 4591 transitions. [2022-02-15 13:29:23,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:23,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4591 transitions. [2022-02-15 13:29:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:23,170 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:23,170 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:23,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:23,383 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,SelfDestructingSolverStorable127 [2022-02-15 13:29:23,383 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:23,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:23,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1577784015, now seen corresponding path program 113 times [2022-02-15 13:29:23,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:23,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653550864] [2022-02-15 13:29:23,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:23,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:23,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:23,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653550864] [2022-02-15 13:29:23,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653550864] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:23,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472160754] [2022-02-15 13:29:23,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:29:23,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:23,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:23,544 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) [2022-02-15 13:29:23,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-02-15 13:29:23,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:29:23,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:23,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:23,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:23,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:23,651 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:29:23,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:23,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:29:23,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:23,975 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:29:24,042 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:24,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:24,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:24,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-02-15 13:29:24,578 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:24,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-02-15 13:29:24,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:24,584 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 99 treesize of output 83 [2022-02-15 13:29:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:24,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472160754] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:24,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:24,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:24,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472549104] [2022-02-15 13:29:24,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:24,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:24,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:24,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:24,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:24,634 INFO L87 Difference]: Start difference. First operand 1423 states and 4591 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:24,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:24,870 INFO L93 Difference]: Finished difference Result 1523 states and 4888 transitions. [2022-02-15 13:29:24,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:29:24,870 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:29:24,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:24,872 INFO L225 Difference]: With dead ends: 1523 [2022-02-15 13:29:24,872 INFO L226 Difference]: Without dead ends: 1488 [2022-02-15 13:29:24,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:24,873 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 62 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:24,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 232 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 503 Invalid, 0 Unknown, 131 Unchecked, 0.2s Time] [2022-02-15 13:29:24,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-02-15 13:29:24,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 1423. [2022-02-15 13:29:24,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 3.228551336146273) internal successors, (4591), 1422 states have internal predecessors, (4591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4591 transitions. [2022-02-15 13:29:24,887 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4591 transitions. Word has length 24 [2022-02-15 13:29:24,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:24,887 INFO L470 AbstractCegarLoop]: Abstraction has 1423 states and 4591 transitions. [2022-02-15 13:29:24,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:24,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4591 transitions. [2022-02-15 13:29:24,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:24,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:24,889 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:24,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:25,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:25,105 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1861457099, now seen corresponding path program 114 times [2022-02-15 13:29:25,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:25,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411207266] [2022-02-15 13:29:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:25,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:25,279 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:25,279 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:25,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411207266] [2022-02-15 13:29:25,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411207266] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:25,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580278296] [2022-02-15 13:29:25,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:29:25,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:25,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:25,281 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) [2022-02-15 13:29:25,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-02-15 13:29:25,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:29:25,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:25,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:25,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:25,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-02-15 13:29:25,427 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 55 treesize of output 45 [2022-02-15 13:29:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:25,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:26,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:26,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-02-15 13:29:26,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:26,411 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 46 treesize of output 45 [2022-02-15 13:29:26,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:26,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-02-15 13:29:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:26,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580278296] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:26,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:26,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:29:26,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878837001] [2022-02-15 13:29:26,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:26,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:29:26,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:26,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:29:26,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:29:26,443 INFO L87 Difference]: Start difference. First operand 1423 states and 4591 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) [2022-02-15 13:29:26,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:26,882 INFO L93 Difference]: Finished difference Result 1808 states and 5672 transitions. [2022-02-15 13:29:26,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:29:26,882 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 24 [2022-02-15 13:29:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:26,885 INFO L225 Difference]: With dead ends: 1808 [2022-02-15 13:29:26,885 INFO L226 Difference]: Without dead ends: 1742 [2022-02-15 13:29:26,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:29:26,886 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 107 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:26,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 235 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:29:26,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2022-02-15 13:29:26,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1423. [2022-02-15 13:29:26,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 3.228551336146273) internal successors, (4591), 1422 states have internal predecessors, (4591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:26,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4591 transitions. [2022-02-15 13:29:26,903 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4591 transitions. Word has length 24 [2022-02-15 13:29:26,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:26,903 INFO L470 AbstractCegarLoop]: Abstraction has 1423 states and 4591 transitions. [2022-02-15 13:29:26,903 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) [2022-02-15 13:29:26,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4591 transitions. [2022-02-15 13:29:26,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:26,905 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:26,905 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:26,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-02-15 13:29:27,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:27,119 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:27,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:27,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1952639283, now seen corresponding path program 115 times [2022-02-15 13:29:27,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:27,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132906896] [2022-02-15 13:29:27,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:27,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:27,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:27,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132906896] [2022-02-15 13:29:27,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132906896] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:27,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821515248] [2022-02-15 13:29:27,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:29:27,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:27,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:27,324 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) [2022-02-15 13:29:27,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-02-15 13:29:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:27,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:29:27,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:27,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:29:27,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:27,769 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-02-15 13:29:27,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:27,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 8 [2022-02-15 13:29:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:27,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:28,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:28,349 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 82 treesize of output 78 [2022-02-15 13:29:28,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:28,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 73 [2022-02-15 13:29:28,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:28,493 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 65 treesize of output 57 [2022-02-15 13:29:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:28,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821515248] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:28,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:28,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:29:28,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283856129] [2022-02-15 13:29:28,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:28,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:29:28,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:28,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:29:28,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:29:28,539 INFO L87 Difference]: Start difference. First operand 1423 states and 4591 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) [2022-02-15 13:29:29,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:29,102 INFO L93 Difference]: Finished difference Result 1643 states and 5188 transitions. [2022-02-15 13:29:29,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:29:29,102 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 24 [2022-02-15 13:29:29,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:29,105 INFO L225 Difference]: With dead ends: 1643 [2022-02-15 13:29:29,105 INFO L226 Difference]: Without dead ends: 1553 [2022-02-15 13:29:29,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:29:29,105 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 81 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:29,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 277 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 845 Invalid, 0 Unknown, 128 Unchecked, 0.3s Time] [2022-02-15 13:29:29,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2022-02-15 13:29:29,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1429. [2022-02-15 13:29:29,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.2324929971988796) internal successors, (4616), 1428 states have internal predecessors, (4616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 4616 transitions. [2022-02-15 13:29:29,125 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 4616 transitions. Word has length 24 [2022-02-15 13:29:29,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:29,125 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 4616 transitions. [2022-02-15 13:29:29,125 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) [2022-02-15 13:29:29,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 4616 transitions. [2022-02-15 13:29:29,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:29,127 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:29,127 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:29,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:29,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:29,343 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:29,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:29,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1178394839, now seen corresponding path program 116 times [2022-02-15 13:29:29,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:29,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276285561] [2022-02-15 13:29:29,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:29,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:29,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:29,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276285561] [2022-02-15 13:29:29,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276285561] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:29,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7023639] [2022-02-15 13:29:29,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:29:29,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:29,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:29,525 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) [2022-02-15 13:29:29,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-02-15 13:29:29,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:29:29,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:29,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:29,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:29,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:29:29,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:29:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:29,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:30,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:30,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 72 [2022-02-15 13:29:30,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:30,360 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 58 treesize of output 55 [2022-02-15 13:29:30,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:30,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2022-02-15 13:29:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:30,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7023639] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:30,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:30,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:30,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397600931] [2022-02-15 13:29:30,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:30,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:30,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:30,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:30,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:30,430 INFO L87 Difference]: Start difference. First operand 1429 states and 4616 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:30,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:30,877 INFO L93 Difference]: Finished difference Result 1763 states and 5537 transitions. [2022-02-15 13:29:30,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:29:30,877 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:29:30,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:30,880 INFO L225 Difference]: With dead ends: 1763 [2022-02-15 13:29:30,880 INFO L226 Difference]: Without dead ends: 1670 [2022-02-15 13:29:30,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:29:30,881 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 93 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:30,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 278 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:29:30,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-02-15 13:29:30,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1433. [2022-02-15 13:29:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 3.2353351955307263) internal successors, (4633), 1432 states have internal predecessors, (4633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 4633 transitions. [2022-02-15 13:29:30,898 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 4633 transitions. Word has length 24 [2022-02-15 13:29:30,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:30,898 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 4633 transitions. [2022-02-15 13:29:30,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 4633 transitions. [2022-02-15 13:29:30,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:30,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:30,900 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:30,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:31,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:31,115 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:31,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:31,116 INFO L85 PathProgramCache]: Analyzing trace with hash -2033777169, now seen corresponding path program 117 times [2022-02-15 13:29:31,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:31,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430757816] [2022-02-15 13:29:31,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:31,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:31,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:31,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430757816] [2022-02-15 13:29:31,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430757816] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:31,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281006967] [2022-02-15 13:29:31,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:29:31,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:31,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:31,293 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) [2022-02-15 13:29:31,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-02-15 13:29:31,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:29:31,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:31,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:29:31,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:31,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:29:31,483 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 30 treesize of output 24 [2022-02-15 13:29:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:31,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:31,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:31,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 74 [2022-02-15 13:29:32,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:32,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 78 [2022-02-15 13:29:32,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:32,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-02-15 13:29:32,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:32,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281006967] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:32,079 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:32,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:29:32,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009078410] [2022-02-15 13:29:32,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:32,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:29:32,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:32,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:29:32,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:29:32,080 INFO L87 Difference]: Start difference. First operand 1433 states and 4633 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-02-15 13:29:32,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:32,641 INFO L93 Difference]: Finished difference Result 1731 states and 5449 transitions. [2022-02-15 13:29:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:29:32,641 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 24 [2022-02-15 13:29:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:32,644 INFO L225 Difference]: With dead ends: 1731 [2022-02-15 13:29:32,644 INFO L226 Difference]: Without dead ends: 1629 [2022-02-15 13:29:32,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:29:32,644 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 76 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:32,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 314 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:29:32,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1629 states. [2022-02-15 13:29:32,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1629 to 1432. [2022-02-15 13:29:32,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 3.2285115303983227) internal successors, (4620), 1431 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:32,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 4620 transitions. [2022-02-15 13:29:32,661 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 4620 transitions. Word has length 24 [2022-02-15 13:29:32,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:32,661 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 4620 transitions. [2022-02-15 13:29:32,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-02-15 13:29:32,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 4620 transitions. [2022-02-15 13:29:32,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:32,663 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:32,663 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:32,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:32,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:32,879 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:32,880 INFO L85 PathProgramCache]: Analyzing trace with hash 2041958899, now seen corresponding path program 118 times [2022-02-15 13:29:32,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:32,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031991498] [2022-02-15 13:29:32,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:32,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:33,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:33,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031991498] [2022-02-15 13:29:33,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031991498] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:33,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559123753] [2022-02-15 13:29:33,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:29:33,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:33,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:33,003 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) [2022-02-15 13:29:33,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-02-15 13:29:33,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:29:33,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:33,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:33,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:33,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:29:33,201 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 26 treesize of output 22 [2022-02-15 13:29:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:33,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:33,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:33,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-02-15 13:29:34,023 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:34,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-02-15 13:29:34,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:34,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-02-15 13:29:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:34,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559123753] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:34,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:34,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:34,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223349451] [2022-02-15 13:29:34,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:34,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:34,090 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:34,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:34,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:34,090 INFO L87 Difference]: Start difference. First operand 1432 states and 4620 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:34,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:34,356 INFO L93 Difference]: Finished difference Result 1619 states and 5113 transitions. [2022-02-15 13:29:34,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:29:34,356 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:29:34,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:34,359 INFO L225 Difference]: With dead ends: 1619 [2022-02-15 13:29:34,359 INFO L226 Difference]: Without dead ends: 1542 [2022-02-15 13:29:34,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:29:34,359 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 98 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:34,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 147 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:29:34,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2022-02-15 13:29:34,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1425. [2022-02-15 13:29:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.229634831460674) internal successors, (4599), 1424 states have internal predecessors, (4599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:34,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4599 transitions. [2022-02-15 13:29:34,375 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4599 transitions. Word has length 24 [2022-02-15 13:29:34,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:34,375 INFO L470 AbstractCegarLoop]: Abstraction has 1425 states and 4599 transitions. [2022-02-15 13:29:34,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:34,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4599 transitions. [2022-02-15 13:29:34,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:34,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:34,377 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:34,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:34,591 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,SelfDestructingSolverStorable133 [2022-02-15 13:29:34,591 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:34,592 INFO L85 PathProgramCache]: Analyzing trace with hash -894721755, now seen corresponding path program 119 times [2022-02-15 13:29:34,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:34,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998103229] [2022-02-15 13:29:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:34,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:34,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:34,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:34,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998103229] [2022-02-15 13:29:34,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998103229] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:34,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893701511] [2022-02-15 13:29:34,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:29:34,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:34,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:34,777 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) [2022-02-15 13:29:34,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-02-15 13:29:34,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:29:34,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:34,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:34,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:34,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:34,904 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 41 treesize of output 35 [2022-02-15 13:29:34,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:34,980 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:29:34,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:34,982 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:29:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:35,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:35,466 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:35,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-02-15 13:29:35,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:35,676 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 123 treesize of output 107 [2022-02-15 13:29:35,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:35,682 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 99 treesize of output 83 [2022-02-15 13:29:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:35,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893701511] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:35,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:35,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:35,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147450082] [2022-02-15 13:29:35,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:35,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:35,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:35,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:35,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:35,756 INFO L87 Difference]: Start difference. First operand 1425 states and 4599 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:36,413 INFO L93 Difference]: Finished difference Result 1632 states and 5132 transitions. [2022-02-15 13:29:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:29:36,413 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:29:36,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:36,416 INFO L225 Difference]: With dead ends: 1632 [2022-02-15 13:29:36,416 INFO L226 Difference]: Without dead ends: 1531 [2022-02-15 13:29:36,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:29:36,416 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 114 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:36,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 189 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 603 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-02-15 13:29:36,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2022-02-15 13:29:36,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 1425. [2022-02-15 13:29:36,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.229634831460674) internal successors, (4599), 1424 states have internal predecessors, (4599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:36,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4599 transitions. [2022-02-15 13:29:36,432 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4599 transitions. Word has length 24 [2022-02-15 13:29:36,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:36,432 INFO L470 AbstractCegarLoop]: Abstraction has 1425 states and 4599 transitions. [2022-02-15 13:29:36,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:36,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4599 transitions. [2022-02-15 13:29:36,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:36,434 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:36,434 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:36,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:36,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-02-15 13:29:36,650 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:36,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:36,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1529507877, now seen corresponding path program 120 times [2022-02-15 13:29:36,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:36,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858406140] [2022-02-15 13:29:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:36,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:29:36,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:36,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858406140] [2022-02-15 13:29:36,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858406140] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:36,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769681205] [2022-02-15 13:29:36,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:29:36,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:36,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:36,924 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) [2022-02-15 13:29:36,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-02-15 13:29:36,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:29:36,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:36,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:36,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:37,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:37,070 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:29:37,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:37,150 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:29:37,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:37,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:29:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:29:37,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:37,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:37,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-02-15 13:29:37,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:37,891 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 126 treesize of output 110 [2022-02-15 13:29:37,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:37,896 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 102 treesize of output 86 [2022-02-15 13:29:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:29:37,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769681205] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:37,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:37,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:37,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850355690] [2022-02-15 13:29:37,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:37,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:37,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:37,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:37,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:37,969 INFO L87 Difference]: Start difference. First operand 1425 states and 4599 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:38,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:38,204 INFO L93 Difference]: Finished difference Result 1525 states and 4878 transitions. [2022-02-15 13:29:38,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:29:38,204 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:29:38,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:38,206 INFO L225 Difference]: With dead ends: 1525 [2022-02-15 13:29:38,206 INFO L226 Difference]: Without dead ends: 1506 [2022-02-15 13:29:38,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:29:38,207 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:38,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 237 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 625 Invalid, 0 Unknown, 201 Unchecked, 0.2s Time] [2022-02-15 13:29:38,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-02-15 13:29:38,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1425. [2022-02-15 13:29:38,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.229634831460674) internal successors, (4599), 1424 states have internal predecessors, (4599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:38,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4599 transitions. [2022-02-15 13:29:38,222 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4599 transitions. Word has length 24 [2022-02-15 13:29:38,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:38,222 INFO L470 AbstractCegarLoop]: Abstraction has 1425 states and 4599 transitions. [2022-02-15 13:29:38,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4599 transitions. [2022-02-15 13:29:38,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:38,224 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:38,224 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:38,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:38,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-02-15 13:29:38,439 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:38,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:38,440 INFO L85 PathProgramCache]: Analyzing trace with hash -165436977, now seen corresponding path program 121 times [2022-02-15 13:29:38,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:38,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392000918] [2022-02-15 13:29:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:38,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:38,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:38,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392000918] [2022-02-15 13:29:38,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392000918] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:38,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477877816] [2022-02-15 13:29:38,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:29:38,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:38,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:38,640 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) [2022-02-15 13:29:38,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-02-15 13:29:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:38,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:38,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:38,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:38,762 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:29:38,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:38,811 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 13:29:38,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:38,814 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:29:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:38,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:39,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:39,407 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 101 treesize of output 95 [2022-02-15 13:29:39,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:39,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-02-15 13:29:39,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:39,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-02-15 13:29:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:39,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477877816] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:39,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:39,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:29:39,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246854809] [2022-02-15 13:29:39,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:39,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:29:39,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:39,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:29:39,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:29:39,762 INFO L87 Difference]: Start difference. First operand 1425 states and 4599 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-02-15 13:29:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:40,293 INFO L93 Difference]: Finished difference Result 1566 states and 4986 transitions. [2022-02-15 13:29:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:29:40,294 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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 24 [2022-02-15 13:29:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:40,296 INFO L225 Difference]: With dead ends: 1566 [2022-02-15 13:29:40,296 INFO L226 Difference]: Without dead ends: 1519 [2022-02-15 13:29:40,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:29:40,297 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 94 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:40,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 171 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 545 Invalid, 0 Unknown, 126 Unchecked, 0.3s Time] [2022-02-15 13:29:40,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2022-02-15 13:29:40,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1425. [2022-02-15 13:29:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.229634831460674) internal successors, (4599), 1424 states have internal predecessors, (4599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:40,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4599 transitions. [2022-02-15 13:29:40,312 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4599 transitions. Word has length 24 [2022-02-15 13:29:40,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:40,313 INFO L470 AbstractCegarLoop]: Abstraction has 1425 states and 4599 transitions. [2022-02-15 13:29:40,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-02-15 13:29:40,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4599 transitions. [2022-02-15 13:29:40,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:40,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:40,315 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:40,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-02-15 13:29:40,531 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,SelfDestructingSolverStorable136 [2022-02-15 13:29:40,531 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:40,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:40,531 INFO L85 PathProgramCache]: Analyzing trace with hash -2036174641, now seen corresponding path program 122 times [2022-02-15 13:29:40,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:40,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740618269] [2022-02-15 13:29:40,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:40,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:29:40,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:40,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740618269] [2022-02-15 13:29:40,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740618269] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:40,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868657587] [2022-02-15 13:29:40,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:29:40,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:40,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:40,748 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) [2022-02-15 13:29:40,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-02-15 13:29:40,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:29:40,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:40,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:40,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:29:40,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2022-02-15 13:29:40,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 36 [2022-02-15 13:29:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:29:41,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:41,905 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:41,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 121 [2022-02-15 13:29:42,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:42,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 53 [2022-02-15 13:29:42,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:42,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 41 [2022-02-15 13:29:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:29:42,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868657587] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:42,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:42,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:29:42,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689737209] [2022-02-15 13:29:42,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:42,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:29:42,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:42,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:29:42,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:29:42,212 INFO L87 Difference]: Start difference. First operand 1425 states and 4599 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) [2022-02-15 13:29:42,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:42,546 INFO L93 Difference]: Finished difference Result 1575 states and 5002 transitions. [2022-02-15 13:29:42,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:29:42,546 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 24 [2022-02-15 13:29:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:42,549 INFO L225 Difference]: With dead ends: 1575 [2022-02-15 13:29:42,549 INFO L226 Difference]: Without dead ends: 1517 [2022-02-15 13:29:42,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:42,549 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 94 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:42,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 161 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:29:42,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2022-02-15 13:29:42,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1423. [2022-02-15 13:29:42,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1423 states, 1422 states have (on average 3.230661040787623) internal successors, (4594), 1422 states have internal predecessors, (4594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1423 states to 1423 states and 4594 transitions. [2022-02-15 13:29:42,565 INFO L78 Accepts]: Start accepts. Automaton has 1423 states and 4594 transitions. Word has length 24 [2022-02-15 13:29:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:42,565 INFO L470 AbstractCegarLoop]: Abstraction has 1423 states and 4594 transitions. [2022-02-15 13:29:42,565 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) [2022-02-15 13:29:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1423 states and 4594 transitions. [2022-02-15 13:29:42,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:42,567 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:42,567 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:42,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:42,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:42,783 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:42,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:42,784 INFO L85 PathProgramCache]: Analyzing trace with hash 630291485, now seen corresponding path program 123 times [2022-02-15 13:29:42,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:42,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182614659] [2022-02-15 13:29:42,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:42,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:42,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:42,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182614659] [2022-02-15 13:29:42,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182614659] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:42,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509291607] [2022-02-15 13:29:42,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:29:42,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:42,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:42,946 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) [2022-02-15 13:29:42,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-02-15 13:29:42,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:29:42,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:42,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:42,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:43,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:43,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:29:43,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:43,221 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:29:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:43,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:43,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:43,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-02-15 13:29:43,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:43,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:29:43,698 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:43,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:29:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:43,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509291607] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:43,718 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:43,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:43,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041137704] [2022-02-15 13:29:43,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:43,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:43,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:43,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:43,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:43,719 INFO L87 Difference]: Start difference. First operand 1423 states and 4594 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:45,330 INFO L93 Difference]: Finished difference Result 2121 states and 6550 transitions. [2022-02-15 13:29:45,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 13:29:45,330 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:29:45,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:45,333 INFO L225 Difference]: With dead ends: 2121 [2022-02-15 13:29:45,333 INFO L226 Difference]: Without dead ends: 1971 [2022-02-15 13:29:45,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=324, Invalid=1746, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 13:29:45,334 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 319 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 545 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:45,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 422 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 917 Invalid, 0 Unknown, 545 Unchecked, 0.4s Time] [2022-02-15 13:29:45,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2022-02-15 13:29:45,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1449. [2022-02-15 13:29:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 3.2320441988950277) internal successors, (4680), 1448 states have internal predecessors, (4680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 4680 transitions. [2022-02-15 13:29:45,351 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 4680 transitions. Word has length 24 [2022-02-15 13:29:45,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:45,351 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 4680 transitions. [2022-02-15 13:29:45,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:45,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 4680 transitions. [2022-02-15 13:29:45,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:45,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:45,353 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:45,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:45,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:45,567 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:45,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:45,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1471968733, now seen corresponding path program 124 times [2022-02-15 13:29:45,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:45,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013721098] [2022-02-15 13:29:45,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:45,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:45,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:45,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:45,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013721098] [2022-02-15 13:29:45,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013721098] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:45,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229356338] [2022-02-15 13:29:45,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:29:45,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:45,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:45,684 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) [2022-02-15 13:29:45,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-02-15 13:29:45,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:29:45,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:45,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:29:45,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:45,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:45,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:29:45,982 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 30 treesize of output 24 [2022-02-15 13:29:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:46,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:46,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:46,495 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 78 treesize of output 70 [2022-02-15 13:29:46,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:46,588 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 35 treesize of output 37 [2022-02-15 13:29:46,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:46,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:29:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:46,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229356338] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:46,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:46,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:29:46,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602406271] [2022-02-15 13:29:46,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:46,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:29:46,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:46,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:29:46,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:29:46,606 INFO L87 Difference]: Start difference. First operand 1449 states and 4680 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) [2022-02-15 13:29:47,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:47,008 INFO L93 Difference]: Finished difference Result 1793 states and 5629 transitions. [2022-02-15 13:29:47,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:29:47,008 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 24 [2022-02-15 13:29:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:47,011 INFO L225 Difference]: With dead ends: 1793 [2022-02-15 13:29:47,011 INFO L226 Difference]: Without dead ends: 1751 [2022-02-15 13:29:47,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:29:47,012 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 146 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:47,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 267 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 727 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-02-15 13:29:47,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2022-02-15 13:29:47,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1477. [2022-02-15 13:29:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.2249322493224932) internal successors, (4760), 1476 states have internal predecessors, (4760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4760 transitions. [2022-02-15 13:29:47,029 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4760 transitions. Word has length 24 [2022-02-15 13:29:47,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:47,029 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 4760 transitions. [2022-02-15 13:29:47,030 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) [2022-02-15 13:29:47,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4760 transitions. [2022-02-15 13:29:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:47,031 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:47,031 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:47,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:47,236 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,SelfDestructingSolverStorable139 [2022-02-15 13:29:47,237 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:47,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:47,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1048051107, now seen corresponding path program 125 times [2022-02-15 13:29:47,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:47,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910123115] [2022-02-15 13:29:47,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:47,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:29:47,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:47,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910123115] [2022-02-15 13:29:47,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910123115] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:47,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354047867] [2022-02-15 13:29:47,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:29:47,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:47,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:47,405 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) [2022-02-15 13:29:47,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-02-15 13:29:47,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:29:47,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:47,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:47,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:47,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:47,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:29:47,753 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 30 treesize of output 24 [2022-02-15 13:29:47,823 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:29:47,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:48,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:48,342 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 120 treesize of output 104 [2022-02-15 13:29:48,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:48,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:29:48,438 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:48,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:29:48,462 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:29:48,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354047867] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:48,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:48,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-15 13:29:48,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335946468] [2022-02-15 13:29:48,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:48,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:29:48,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:48,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:29:48,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:29:48,463 INFO L87 Difference]: Start difference. First operand 1477 states and 4760 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:49,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:49,004 INFO L93 Difference]: Finished difference Result 1708 states and 5432 transitions. [2022-02-15 13:29:49,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:29:49,004 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:29:49,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:49,007 INFO L225 Difference]: With dead ends: 1708 [2022-02-15 13:29:49,007 INFO L226 Difference]: Without dead ends: 1677 [2022-02-15 13:29:49,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:29:49,007 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 116 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:49,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 304 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 817 Invalid, 0 Unknown, 128 Unchecked, 0.3s Time] [2022-02-15 13:29:49,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2022-02-15 13:29:49,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1471. [2022-02-15 13:29:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 3.2183673469387757) internal successors, (4731), 1470 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:49,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 4731 transitions. [2022-02-15 13:29:49,024 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 4731 transitions. Word has length 24 [2022-02-15 13:29:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:49,024 INFO L470 AbstractCegarLoop]: Abstraction has 1471 states and 4731 transitions. [2022-02-15 13:29:49,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 4731 transitions. [2022-02-15 13:29:49,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:49,026 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:49,026 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:49,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:49,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:49,243 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:49,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:49,243 INFO L85 PathProgramCache]: Analyzing trace with hash -308035559, now seen corresponding path program 126 times [2022-02-15 13:29:49,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:49,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659081774] [2022-02-15 13:29:49,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:49,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:49,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:49,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659081774] [2022-02-15 13:29:49,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659081774] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:49,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106665609] [2022-02-15 13:29:49,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:29:49,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:49,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:49,383 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) [2022-02-15 13:29:49,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-02-15 13:29:49,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:29:49,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:49,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:49,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:49,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:49,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:29:49,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:49,651 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2022-02-15 13:29:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:49,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:50,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:50,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-02-15 13:29:50,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:50,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:29:50,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:50,513 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 25 treesize of output 27 [2022-02-15 13:29:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:50,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106665609] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:50,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:50,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:29:50,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119446931] [2022-02-15 13:29:50,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:50,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:29:50,532 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:50,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:29:50,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:29:50,533 INFO L87 Difference]: Start difference. First operand 1471 states and 4731 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) [2022-02-15 13:29:51,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:51,350 INFO L93 Difference]: Finished difference Result 1942 states and 6037 transitions. [2022-02-15 13:29:51,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 13:29:51,350 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 24 [2022-02-15 13:29:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:51,353 INFO L225 Difference]: With dead ends: 1942 [2022-02-15 13:29:51,354 INFO L226 Difference]: Without dead ends: 1823 [2022-02-15 13:29:51,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:29:51,354 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 173 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:51,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 317 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 829 Invalid, 0 Unknown, 104 Unchecked, 0.4s Time] [2022-02-15 13:29:51,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1823 states. [2022-02-15 13:29:51,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1823 to 1475. [2022-02-15 13:29:51,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1474 states have (on average 3.216417910447761) internal successors, (4741), 1474 states have internal predecessors, (4741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 4741 transitions. [2022-02-15 13:29:51,372 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 4741 transitions. Word has length 24 [2022-02-15 13:29:51,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:51,372 INFO L470 AbstractCegarLoop]: Abstraction has 1475 states and 4741 transitions. [2022-02-15 13:29:51,372 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) [2022-02-15 13:29:51,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 4741 transitions. [2022-02-15 13:29:51,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:51,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:51,374 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:51,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:51,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:51,587 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:51,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:51,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1605433057, now seen corresponding path program 127 times [2022-02-15 13:29:51,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:51,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412399662] [2022-02-15 13:29:51,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:51,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:51,752 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:51,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412399662] [2022-02-15 13:29:51,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412399662] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:51,752 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271745328] [2022-02-15 13:29:51,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:29:51,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:51,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:51,754 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) [2022-02-15 13:29:51,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-02-15 13:29:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:51,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:29:51,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:51,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:51,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:29:51,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:29:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:52,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:52,386 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:52,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-15 13:29:52,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:52,461 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 35 treesize of output 37 [2022-02-15 13:29:52,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:52,464 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 29 treesize of output 31 [2022-02-15 13:29:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:52,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271745328] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:52,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:52,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-15 13:29:52,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267604099] [2022-02-15 13:29:52,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:52,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:29:52,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:52,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:29:52,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:29:52,479 INFO L87 Difference]: Start difference. First operand 1475 states and 4741 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) [2022-02-15 13:29:52,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:52,846 INFO L93 Difference]: Finished difference Result 1811 states and 5747 transitions. [2022-02-15 13:29:52,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:29:52,846 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 24 [2022-02-15 13:29:52,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:52,849 INFO L225 Difference]: With dead ends: 1811 [2022-02-15 13:29:52,849 INFO L226 Difference]: Without dead ends: 1702 [2022-02-15 13:29:52,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:52,850 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 131 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:52,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 240 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 734 Invalid, 0 Unknown, 21 Unchecked, 0.3s Time] [2022-02-15 13:29:52,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2022-02-15 13:29:52,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1482. [2022-02-15 13:29:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 3.211343686698177) internal successors, (4756), 1481 states have internal predecessors, (4756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 4756 transitions. [2022-02-15 13:29:52,866 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 4756 transitions. Word has length 24 [2022-02-15 13:29:52,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:52,866 INFO L470 AbstractCegarLoop]: Abstraction has 1482 states and 4756 transitions. [2022-02-15 13:29:52,866 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) [2022-02-15 13:29:52,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 4756 transitions. [2022-02-15 13:29:52,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:52,868 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:52,868 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:52,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:53,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:53,084 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:53,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1312087331, now seen corresponding path program 128 times [2022-02-15 13:29:53,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:53,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304700093] [2022-02-15 13:29:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:53,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:53,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:53,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304700093] [2022-02-15 13:29:53,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304700093] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:53,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382824807] [2022-02-15 13:29:53,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:29:53,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:53,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:53,240 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) [2022-02-15 13:29:53,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-02-15 13:29:53,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:29:53,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:53,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:29:53,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:53,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:53,322 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:29:53,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:53,487 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-15 13:29:53,530 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:53,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:53,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:53,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-02-15 13:29:53,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:53,982 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 31 treesize of output 33 [2022-02-15 13:29:53,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:53,985 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 25 treesize of output 27 [2022-02-15 13:29:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:54,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382824807] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:54,006 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:54,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:54,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283482568] [2022-02-15 13:29:54,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:54,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:54,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:54,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:54,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:54,006 INFO L87 Difference]: Start difference. First operand 1482 states and 4756 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:54,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:54,814 INFO L93 Difference]: Finished difference Result 1805 states and 5820 transitions. [2022-02-15 13:29:54,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:29:54,814 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:29:54,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:54,817 INFO L225 Difference]: With dead ends: 1805 [2022-02-15 13:29:54,817 INFO L226 Difference]: Without dead ends: 1746 [2022-02-15 13:29:54,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:29:54,817 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 181 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:54,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 300 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 736 Invalid, 0 Unknown, 427 Unchecked, 0.3s Time] [2022-02-15 13:29:54,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2022-02-15 13:29:54,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1486. [2022-02-15 13:29:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1485 states have (on average 3.2114478114478113) internal successors, (4769), 1485 states have internal predecessors, (4769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 4769 transitions. [2022-02-15 13:29:54,834 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 4769 transitions. Word has length 24 [2022-02-15 13:29:54,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:54,834 INFO L470 AbstractCegarLoop]: Abstraction has 1486 states and 4769 transitions. [2022-02-15 13:29:54,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:54,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 4769 transitions. [2022-02-15 13:29:54,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:54,836 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:54,836 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:54,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:55,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:55,053 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:55,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:55,053 INFO L85 PathProgramCache]: Analyzing trace with hash 767206497, now seen corresponding path program 129 times [2022-02-15 13:29:55,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:55,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389450006] [2022-02-15 13:29:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:55,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:55,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:55,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389450006] [2022-02-15 13:29:55,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389450006] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:55,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108260660] [2022-02-15 13:29:55,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:29:55,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:55,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:55,209 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) [2022-02-15 13:29:55,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-02-15 13:29:55,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:29:55,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:55,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:29:55,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:55,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:29:55,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:29:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:55,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:56,055 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:56,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-02-15 13:29:56,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:56,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:29:56,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:56,201 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 29 treesize of output 31 [2022-02-15 13:29:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:56,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108260660] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:56,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:56,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:56,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120569349] [2022-02-15 13:29:56,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:56,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:56,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:56,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:56,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:56,215 INFO L87 Difference]: Start difference. First operand 1486 states and 4769 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:57,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:29:57,932 INFO L93 Difference]: Finished difference Result 2676 states and 7993 transitions. [2022-02-15 13:29:57,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 13:29:57,933 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:29:57,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:29:57,937 INFO L225 Difference]: With dead ends: 2676 [2022-02-15 13:29:57,937 INFO L226 Difference]: Without dead ends: 2492 [2022-02-15 13:29:57,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=298, Invalid=1342, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:29:57,937 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 272 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:29:57,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 489 Invalid, 1466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1409 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:29:57,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2022-02-15 13:29:57,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 1500. [2022-02-15 13:29:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 3.218812541694463) internal successors, (4825), 1499 states have internal predecessors, (4825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:29:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 4825 transitions. [2022-02-15 13:29:57,962 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 4825 transitions. Word has length 24 [2022-02-15 13:29:57,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:29:57,962 INFO L470 AbstractCegarLoop]: Abstraction has 1500 states and 4825 transitions. [2022-02-15 13:29:57,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:29:57,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 4825 transitions. [2022-02-15 13:29:57,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:29:57,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:29:57,963 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:29:57,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-02-15 13:29:58,180 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,SelfDestructingSolverStorable144 [2022-02-15 13:29:58,180 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:29:58,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:29:58,180 INFO L85 PathProgramCache]: Analyzing trace with hash -959553497, now seen corresponding path program 130 times [2022-02-15 13:29:58,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:29:58,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455854959] [2022-02-15 13:29:58,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:29:58,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:29:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:29:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:58,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:29:58,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455854959] [2022-02-15 13:29:58,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455854959] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:29:58,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191235291] [2022-02-15 13:29:58,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:29:58,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:29:58,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:29:58,381 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) [2022-02-15 13:29:58,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-02-15 13:29:58,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:29:58,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:29:58,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:29:58,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:29:58,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:58,495 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:29:59,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:59,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:29:59,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:29:59,251 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:29:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:59,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:29:59,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:59,824 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 78 treesize of output 70 [2022-02-15 13:29:59,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:59,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:29:59,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:29:59,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:29:59,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:29:59,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191235291] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:29:59,935 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:29:59,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:29:59,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256420374] [2022-02-15 13:29:59,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:29:59,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:29:59,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:29:59,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:29:59,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:29:59,936 INFO L87 Difference]: Start difference. First operand 1500 states and 4825 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:00,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:00,234 INFO L93 Difference]: Finished difference Result 1603 states and 5119 transitions. [2022-02-15 13:30:00,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:30:00,235 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:30:00,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:00,237 INFO L225 Difference]: With dead ends: 1603 [2022-02-15 13:30:00,238 INFO L226 Difference]: Without dead ends: 1544 [2022-02-15 13:30:00,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:30:00,238 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:00,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 219 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 553 Invalid, 0 Unknown, 263 Unchecked, 0.2s Time] [2022-02-15 13:30:00,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2022-02-15 13:30:00,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1501. [2022-02-15 13:30:00,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1500 states have (on average 3.219333333333333) internal successors, (4829), 1500 states have internal predecessors, (4829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:00,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 4829 transitions. [2022-02-15 13:30:00,255 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 4829 transitions. Word has length 24 [2022-02-15 13:30:00,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:00,255 INFO L470 AbstractCegarLoop]: Abstraction has 1501 states and 4829 transitions. [2022-02-15 13:30:00,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:00,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 4829 transitions. [2022-02-15 13:30:00,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:00,256 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:00,257 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:00,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:00,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-02-15 13:30:00,457 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:00,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:00,457 INFO L85 PathProgramCache]: Analyzing trace with hash 204379677, now seen corresponding path program 131 times [2022-02-15 13:30:00,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:00,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352979867] [2022-02-15 13:30:00,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:00,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:00,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:00,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352979867] [2022-02-15 13:30:00,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352979867] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:00,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827410921] [2022-02-15 13:30:00,668 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:30:00,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:00,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:00,669 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) [2022-02-15 13:30:00,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-02-15 13:30:00,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:30:00,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:00,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:00,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:00,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:30:00,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:30:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:00,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:01,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:01,566 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 120 treesize of output 104 [2022-02-15 13:30:01,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:01,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:30:01,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:01,706 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 25 treesize of output 27 [2022-02-15 13:30:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:01,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827410921] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:01,724 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:01,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:30:01,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544696649] [2022-02-15 13:30:01,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:01,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:30:01,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:01,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:30:01,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:01,725 INFO L87 Difference]: Start difference. First operand 1501 states and 4829 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:02,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:02,664 INFO L93 Difference]: Finished difference Result 2105 states and 6525 transitions. [2022-02-15 13:30:02,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:30:02,664 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:30:02,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:02,667 INFO L225 Difference]: With dead ends: 2105 [2022-02-15 13:30:02,667 INFO L226 Difference]: Without dead ends: 1984 [2022-02-15 13:30:02,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:30:02,670 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 161 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:02,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 377 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:30:02,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2022-02-15 13:30:02,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1518. [2022-02-15 13:30:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.2241265655899802) internal successors, (4891), 1517 states have internal predecessors, (4891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:02,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 4891 transitions. [2022-02-15 13:30:02,689 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 4891 transitions. Word has length 24 [2022-02-15 13:30:02,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:02,689 INFO L470 AbstractCegarLoop]: Abstraction has 1518 states and 4891 transitions. [2022-02-15 13:30:02,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:02,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 4891 transitions. [2022-02-15 13:30:02,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:02,691 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:02,691 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:02,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:02,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-02-15 13:30:02,907 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:02,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:02,907 INFO L85 PathProgramCache]: Analyzing trace with hash -651002653, now seen corresponding path program 132 times [2022-02-15 13:30:02,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:02,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393387434] [2022-02-15 13:30:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:02,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:03,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:03,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393387434] [2022-02-15 13:30:03,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393387434] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:03,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321877564] [2022-02-15 13:30:03,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:30:03,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:03,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:03,121 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) [2022-02-15 13:30:03,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-02-15 13:30:03,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:30:03,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:03,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:30:03,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:03,178 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 41 treesize of output 35 [2022-02-15 13:30:03,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:30:03,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-02-15 13:30:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:03,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:03,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:03,716 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 78 treesize of output 70 [2022-02-15 13:30:03,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:03,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:30:03,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:03,801 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 29 treesize of output 31 [2022-02-15 13:30:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:03,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321877564] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:03,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:03,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:30:03,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635309983] [2022-02-15 13:30:03,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:03,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:30:03,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:03,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:30:03,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:03,816 INFO L87 Difference]: Start difference. First operand 1518 states and 4891 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:04,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:04,822 INFO L93 Difference]: Finished difference Result 2256 states and 7028 transitions. [2022-02-15 13:30:04,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:30:04,822 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:30:04,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:04,826 INFO L225 Difference]: With dead ends: 2256 [2022-02-15 13:30:04,826 INFO L226 Difference]: Without dead ends: 2151 [2022-02-15 13:30:04,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:30:04,826 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 138 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:04,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 406 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:30:04,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2022-02-15 13:30:04,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1527. [2022-02-15 13:30:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 3.2280471821756227) internal successors, (4926), 1526 states have internal predecessors, (4926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:04,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 4926 transitions. [2022-02-15 13:30:04,846 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 4926 transitions. Word has length 24 [2022-02-15 13:30:04,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:04,847 INFO L470 AbstractCegarLoop]: Abstraction has 1527 states and 4926 transitions. [2022-02-15 13:30:04,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:04,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 4926 transitions. [2022-02-15 13:30:04,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:04,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:04,849 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:04,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:05,052 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,SelfDestructingSolverStorable147 [2022-02-15 13:30:05,052 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:05,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:05,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2026002287, now seen corresponding path program 133 times [2022-02-15 13:30:05,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:05,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209272136] [2022-02-15 13:30:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:05,053 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:05,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:05,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209272136] [2022-02-15 13:30:05,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209272136] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:05,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732922300] [2022-02-15 13:30:05,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:30:05,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:05,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:05,190 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) [2022-02-15 13:30:05,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-02-15 13:30:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:05,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:30:05,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:05,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:30:05,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:30:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:05,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:05,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:05,792 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 78 treesize of output 70 [2022-02-15 13:30:05,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:05,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:30:05,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:05,904 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:30:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:05,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732922300] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:05,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:05,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:30:05,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796671702] [2022-02-15 13:30:05,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:05,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:30:05,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:05,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:30:05,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:30:05,922 INFO L87 Difference]: Start difference. First operand 1527 states and 4926 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2022-02-15 13:30:06,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:06,652 INFO L93 Difference]: Finished difference Result 2104 states and 6549 transitions. [2022-02-15 13:30:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:30:06,652 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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 24 [2022-02-15 13:30:06,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:06,656 INFO L225 Difference]: With dead ends: 2104 [2022-02-15 13:30:06,656 INFO L226 Difference]: Without dead ends: 1971 [2022-02-15 13:30:06,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:30:06,656 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 151 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:06,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 276 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 789 Invalid, 0 Unknown, 124 Unchecked, 0.4s Time] [2022-02-15 13:30:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2022-02-15 13:30:06,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1521. [2022-02-15 13:30:06,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.2276315789473684) internal successors, (4906), 1520 states have internal predecessors, (4906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 4906 transitions. [2022-02-15 13:30:06,685 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 4906 transitions. Word has length 24 [2022-02-15 13:30:06,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:06,685 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 4906 transitions. [2022-02-15 13:30:06,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2022-02-15 13:30:06,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 4906 transitions. [2022-02-15 13:30:06,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:06,687 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:06,687 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:06,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:06,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:06,903 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:06,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:06,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1582657373, now seen corresponding path program 134 times [2022-02-15 13:30:06,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:06,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209150053] [2022-02-15 13:30:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:06,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:07,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:07,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:07,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209150053] [2022-02-15 13:30:07,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209150053] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:07,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598467756] [2022-02-15 13:30:07,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:30:07,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:07,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:07,047 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) [2022-02-15 13:30:07,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-02-15 13:30:07,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:30:07,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:07,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:07,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:07,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:30:07,217 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 30 treesize of output 24 [2022-02-15 13:30:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:07,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:07,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:07,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-02-15 13:30:07,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:07,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-15 13:30:07,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:07,598 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 28 treesize of output 30 [2022-02-15 13:30:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:07,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598467756] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:07,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:07,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-15 13:30:07,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969944447] [2022-02-15 13:30:07,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:07,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:30:07,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:07,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:30:07,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:30:07,620 INFO L87 Difference]: Start difference. First operand 1521 states and 4906 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2022-02-15 13:30:07,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:07,934 INFO L93 Difference]: Finished difference Result 1653 states and 5296 transitions. [2022-02-15 13:30:07,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:30:07,935 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 24 [2022-02-15 13:30:07,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:07,937 INFO L225 Difference]: With dead ends: 1653 [2022-02-15 13:30:07,937 INFO L226 Difference]: Without dead ends: 1622 [2022-02-15 13:30:07,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:30:07,938 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 75 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:07,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 224 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:30:07,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2022-02-15 13:30:07,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1528. [2022-02-15 13:30:07,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 3.226588081204977) internal successors, (4927), 1527 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 4927 transitions. [2022-02-15 13:30:07,983 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 4927 transitions. Word has length 24 [2022-02-15 13:30:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:07,983 INFO L470 AbstractCegarLoop]: Abstraction has 1528 states and 4927 transitions. [2022-02-15 13:30:07,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2022-02-15 13:30:07,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 4927 transitions. [2022-02-15 13:30:07,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:07,985 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:07,985 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:08,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-02-15 13:30:08,195 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,SelfDestructingSolverStorable149 [2022-02-15 13:30:08,195 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:08,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:08,196 INFO L85 PathProgramCache]: Analyzing trace with hash 496636455, now seen corresponding path program 135 times [2022-02-15 13:30:08,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:08,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725975498] [2022-02-15 13:30:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:08,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:08,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:08,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725975498] [2022-02-15 13:30:08,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725975498] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:08,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767894293] [2022-02-15 13:30:08,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:30:08,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:08,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:08,444 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) [2022-02-15 13:30:08,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-02-15 13:30:08,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:30:08,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:08,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:30:08,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:08,573 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 26 treesize of output 20 [2022-02-15 13:30:08,619 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 30 treesize of output 24 [2022-02-15 13:30:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:08,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:09,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:09,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-15 13:30:09,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:09,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:30:09,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:09,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:30:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:09,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767894293] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:09,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:09,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:30:09,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748427793] [2022-02-15 13:30:09,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:09,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:30:09,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:09,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:30:09,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:30:09,350 INFO L87 Difference]: Start difference. First operand 1528 states and 4927 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) [2022-02-15 13:30:10,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:10,242 INFO L93 Difference]: Finished difference Result 2082 states and 6361 transitions. [2022-02-15 13:30:10,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:30:10,242 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 24 [2022-02-15 13:30:10,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:10,245 INFO L225 Difference]: With dead ends: 2082 [2022-02-15 13:30:10,245 INFO L226 Difference]: Without dead ends: 1929 [2022-02-15 13:30:10,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:30:10,246 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 155 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:10,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 412 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:30:10,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2022-02-15 13:30:10,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1529. [2022-02-15 13:30:10,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.227094240837696) internal successors, (4931), 1528 states have internal predecessors, (4931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4931 transitions. [2022-02-15 13:30:10,265 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4931 transitions. Word has length 24 [2022-02-15 13:30:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:10,265 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 4931 transitions. [2022-02-15 13:30:10,265 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) [2022-02-15 13:30:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4931 transitions. [2022-02-15 13:30:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:10,267 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:10,268 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:10,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-02-15 13:30:10,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:10,479 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:10,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:10,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1652160081, now seen corresponding path program 136 times [2022-02-15 13:30:10,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:10,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032621950] [2022-02-15 13:30:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:10,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:10,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:10,619 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:10,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032621950] [2022-02-15 13:30:10,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032621950] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:10,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155156432] [2022-02-15 13:30:10,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:30:10,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:10,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:10,620 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) [2022-02-15 13:30:10,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-02-15 13:30:10,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:30:10,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:10,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:30:10,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:10,747 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 26 treesize of output 20 [2022-02-15 13:30:10,787 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 30 treesize of output 24 [2022-02-15 13:30:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:10,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:11,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:11,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-02-15 13:30:11,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:11,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:30:11,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:11,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:30:11,351 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:11,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155156432] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:11,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:11,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:30:11,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711530696] [2022-02-15 13:30:11,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:11,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:30:11,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:11,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:30:11,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:30:11,352 INFO L87 Difference]: Start difference. First operand 1529 states and 4931 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) [2022-02-15 13:30:12,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:12,045 INFO L93 Difference]: Finished difference Result 1974 states and 6154 transitions. [2022-02-15 13:30:12,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:30:12,045 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 24 [2022-02-15 13:30:12,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:12,048 INFO L225 Difference]: With dead ends: 1974 [2022-02-15 13:30:12,048 INFO L226 Difference]: Without dead ends: 1821 [2022-02-15 13:30:12,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:30:12,048 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 238 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:12,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 234 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:30:12,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2022-02-15 13:30:12,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1529. [2022-02-15 13:30:12,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 3.227094240837696) internal successors, (4931), 1528 states have internal predecessors, (4931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:12,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4931 transitions. [2022-02-15 13:30:12,067 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4931 transitions. Word has length 24 [2022-02-15 13:30:12,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:12,067 INFO L470 AbstractCegarLoop]: Abstraction has 1529 states and 4931 transitions. [2022-02-15 13:30:12,067 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) [2022-02-15 13:30:12,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4931 transitions. [2022-02-15 13:30:12,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:12,070 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:12,070 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:12,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:12,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:12,286 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:12,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:12,286 INFO L85 PathProgramCache]: Analyzing trace with hash 257836915, now seen corresponding path program 137 times [2022-02-15 13:30:12,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:12,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326756131] [2022-02-15 13:30:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:12,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:12,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:12,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326756131] [2022-02-15 13:30:12,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326756131] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:12,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948718750] [2022-02-15 13:30:12,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:30:12,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:12,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:12,427 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) [2022-02-15 13:30:12,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-02-15 13:30:12,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:30:12,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:12,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:12,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:12,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:30:12,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:30:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:12,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:12,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:12,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:30:13,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:13,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:30:13,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:13,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:30:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:13,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948718750] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:13,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:13,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:30:13,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85258822] [2022-02-15 13:30:13,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:13,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:30:13,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:13,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:30:13,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:13,087 INFO L87 Difference]: Start difference. First operand 1529 states and 4931 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:13,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:13,734 INFO L93 Difference]: Finished difference Result 1905 states and 5978 transitions. [2022-02-15 13:30:13,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:30:13,734 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:30:13,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:13,738 INFO L225 Difference]: With dead ends: 1905 [2022-02-15 13:30:13,738 INFO L226 Difference]: Without dead ends: 1816 [2022-02-15 13:30:13,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:30:13,740 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 102 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:13,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 332 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:30:13,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2022-02-15 13:30:13,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1534. [2022-02-15 13:30:13,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1533 states have (on average 3.2270058708414875) internal successors, (4947), 1533 states have internal predecessors, (4947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:13,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 4947 transitions. [2022-02-15 13:30:13,762 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 4947 transitions. Word has length 24 [2022-02-15 13:30:13,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:13,762 INFO L470 AbstractCegarLoop]: Abstraction has 1534 states and 4947 transitions. [2022-02-15 13:30:13,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:13,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 4947 transitions. [2022-02-15 13:30:13,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:13,764 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:13,764 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:13,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:13,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:13,980 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:13,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:13,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1421770089, now seen corresponding path program 138 times [2022-02-15 13:30:13,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:13,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136721192] [2022-02-15 13:30:13,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:13,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:14,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:14,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136721192] [2022-02-15 13:30:14,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136721192] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:14,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613454050] [2022-02-15 13:30:14,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:30:14,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:14,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:14,109 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) [2022-02-15 13:30:14,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-02-15 13:30:14,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:30:14,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:14,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:14,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:14,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:14,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:30:14,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:14,516 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:30:14,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:14,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:30:14,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:14,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:15,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:15,006 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 79 treesize of output 70 [2022-02-15 13:30:15,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:15,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:30:15,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:15,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:30:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:15,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613454050] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:15,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:15,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:30:15,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333064730] [2022-02-15 13:30:15,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:15,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:30:15,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:15,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:30:15,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:15,101 INFO L87 Difference]: Start difference. First operand 1534 states and 4947 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:15,865 INFO L93 Difference]: Finished difference Result 1936 states and 5909 transitions. [2022-02-15 13:30:15,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:30:15,865 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:30:15,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:15,869 INFO L225 Difference]: With dead ends: 1936 [2022-02-15 13:30:15,869 INFO L226 Difference]: Without dead ends: 1825 [2022-02-15 13:30:15,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:30:15,869 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 173 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:15,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 385 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 927 Invalid, 0 Unknown, 410 Unchecked, 0.3s Time] [2022-02-15 13:30:15,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2022-02-15 13:30:15,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1535. [2022-02-15 13:30:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.227509778357236) internal successors, (4951), 1534 states have internal predecessors, (4951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 4951 transitions. [2022-02-15 13:30:15,887 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 4951 transitions. Word has length 24 [2022-02-15 13:30:15,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:15,888 INFO L470 AbstractCegarLoop]: Abstraction has 1535 states and 4951 transitions. [2022-02-15 13:30:15,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:15,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 4951 transitions. [2022-02-15 13:30:15,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:15,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:15,889 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:15,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:16,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:16,105 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:16,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:16,106 INFO L85 PathProgramCache]: Analyzing trace with hash 347156531, now seen corresponding path program 139 times [2022-02-15 13:30:16,106 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:16,106 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836791001] [2022-02-15 13:30:16,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:16,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:16,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:16,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836791001] [2022-02-15 13:30:16,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836791001] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:16,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082545533] [2022-02-15 13:30:16,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:30:16,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:16,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:16,278 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) [2022-02-15 13:30:16,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-02-15 13:30:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:16,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:16,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:16,390 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 41 treesize of output 35 [2022-02-15 13:30:16,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:30:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:16,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:17,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:17,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:30:17,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:17,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:30:17,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:17,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:30:17,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:17,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082545533] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:17,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:17,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:30:17,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882985956] [2022-02-15 13:30:17,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:17,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:30:17,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:17,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:30:17,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:17,203 INFO L87 Difference]: Start difference. First operand 1535 states and 4951 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:17,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:17,839 INFO L93 Difference]: Finished difference Result 1871 states and 5950 transitions. [2022-02-15 13:30:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:30:17,839 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:30:17,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:17,842 INFO L225 Difference]: With dead ends: 1871 [2022-02-15 13:30:17,842 INFO L226 Difference]: Without dead ends: 1798 [2022-02-15 13:30:17,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:30:17,843 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 144 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:17,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 280 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:30:17,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2022-02-15 13:30:17,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1543. [2022-02-15 13:30:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1542 states have (on average 3.2328145265888457) internal successors, (4985), 1542 states have internal predecessors, (4985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:17,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 4985 transitions. [2022-02-15 13:30:17,873 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 4985 transitions. Word has length 24 [2022-02-15 13:30:17,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:17,873 INFO L470 AbstractCegarLoop]: Abstraction has 1543 states and 4985 transitions. [2022-02-15 13:30:17,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:17,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 4985 transitions. [2022-02-15 13:30:17,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:17,875 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:17,875 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:17,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:18,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2022-02-15 13:30:18,091 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:18,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:18,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1705443173, now seen corresponding path program 140 times [2022-02-15 13:30:18,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:18,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853007806] [2022-02-15 13:30:18,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:18,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:18,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:18,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853007806] [2022-02-15 13:30:18,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853007806] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:18,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077533632] [2022-02-15 13:30:18,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:30:18,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:18,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:18,240 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) [2022-02-15 13:30:18,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-02-15 13:30:18,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:30:18,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:18,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:18,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:18,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:18,349 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:30:18,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:18,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:30:18,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:18,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:30:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:18,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:19,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:19,110 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 72 treesize of output 65 [2022-02-15 13:30:19,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:19,254 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 31 treesize of output 33 [2022-02-15 13:30:19,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:19,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:30:19,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:19,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077533632] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:19,275 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:19,275 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:30:19,275 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087597581] [2022-02-15 13:30:19,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:19,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:30:19,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:19,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:30:19,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:19,275 INFO L87 Difference]: Start difference. First operand 1543 states and 4985 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:19,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:19,581 INFO L93 Difference]: Finished difference Result 1673 states and 5344 transitions. [2022-02-15 13:30:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:30:19,581 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:30:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:19,584 INFO L225 Difference]: With dead ends: 1673 [2022-02-15 13:30:19,584 INFO L226 Difference]: Without dead ends: 1607 [2022-02-15 13:30:19,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:30:19,584 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:19,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 176 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 503 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-02-15 13:30:19,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1607 states. [2022-02-15 13:30:19,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1607 to 1543. [2022-02-15 13:30:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 1542 states have (on average 3.2328145265888457) internal successors, (4985), 1542 states have internal predecessors, (4985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:19,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 4985 transitions. [2022-02-15 13:30:19,601 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 4985 transitions. Word has length 24 [2022-02-15 13:30:19,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:19,602 INFO L470 AbstractCegarLoop]: Abstraction has 1543 states and 4985 transitions. [2022-02-15 13:30:19,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:19,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 4985 transitions. [2022-02-15 13:30:19,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:19,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:19,604 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:19,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-02-15 13:30:19,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-02-15 13:30:19,810 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:19,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:19,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1098593955, now seen corresponding path program 141 times [2022-02-15 13:30:19,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:19,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381307989] [2022-02-15 13:30:19,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:19,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:19,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:19,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381307989] [2022-02-15 13:30:19,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381307989] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:19,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419463191] [2022-02-15 13:30:19,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:30:19,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:19,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:19,970 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) [2022-02-15 13:30:19,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-02-15 13:30:19,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:30:19,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:19,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:20,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:30:20,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:20,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-15 13:30:20,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:20,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:30:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:20,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:20,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:20,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2022-02-15 13:30:21,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:21,084 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 31 treesize of output 33 [2022-02-15 13:30:21,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:21,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:30:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:21,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419463191] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:21,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:21,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:30:21,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925305437] [2022-02-15 13:30:21,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:21,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:30:21,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:21,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:30:21,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:30:21,109 INFO L87 Difference]: Start difference. First operand 1543 states and 4985 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) [2022-02-15 13:30:21,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:21,448 INFO L93 Difference]: Finished difference Result 1738 states and 5532 transitions. [2022-02-15 13:30:21,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:30:21,448 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 24 [2022-02-15 13:30:21,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:21,451 INFO L225 Difference]: With dead ends: 1738 [2022-02-15 13:30:21,451 INFO L226 Difference]: Without dead ends: 1677 [2022-02-15 13:30:21,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:30:21,451 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 66 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:21,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 202 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 529 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-02-15 13:30:21,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2022-02-15 13:30:21,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1563. [2022-02-15 13:30:21,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1562 states have (on average 3.230473751600512) internal successors, (5046), 1562 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:21,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 5046 transitions. [2022-02-15 13:30:21,468 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 5046 transitions. Word has length 24 [2022-02-15 13:30:21,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:21,468 INFO L470 AbstractCegarLoop]: Abstraction has 1563 states and 5046 transitions. [2022-02-15 13:30:21,468 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) [2022-02-15 13:30:21,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 5046 transitions. [2022-02-15 13:30:21,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:21,470 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:21,470 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:21,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-02-15 13:30:21,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:21,674 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:21,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:21,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1782179871, now seen corresponding path program 142 times [2022-02-15 13:30:21,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:21,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101425214] [2022-02-15 13:30:21,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:21,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:21,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:21,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101425214] [2022-02-15 13:30:21,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101425214] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:21,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941440711] [2022-02-15 13:30:21,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:30:21,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:21,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:21,854 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) [2022-02-15 13:30:21,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-02-15 13:30:21,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:30:21,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:21,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:30:21,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:21,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:30:22,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:22,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 22 [2022-02-15 13:30:22,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:22,006 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:30:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:22,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:22,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:22,464 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 110 treesize of output 98 [2022-02-15 13:30:22,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:22,628 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 35 treesize of output 37 [2022-02-15 13:30:22,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:22,631 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 29 treesize of output 31 [2022-02-15 13:30:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:22,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941440711] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:22,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:22,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:30:22,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505217789] [2022-02-15 13:30:22,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:22,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:30:22,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:22,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:30:22,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:22,646 INFO L87 Difference]: Start difference. First operand 1563 states and 5046 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:23,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:23,450 INFO L93 Difference]: Finished difference Result 2105 states and 6503 transitions. [2022-02-15 13:30:23,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:30:23,450 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:30:23,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:23,454 INFO L225 Difference]: With dead ends: 2105 [2022-02-15 13:30:23,454 INFO L226 Difference]: Without dead ends: 1952 [2022-02-15 13:30:23,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:30:23,454 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 159 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:23,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 345 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1089 Invalid, 0 Unknown, 6 Unchecked, 0.3s Time] [2022-02-15 13:30:23,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2022-02-15 13:30:23,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1564. [2022-02-15 13:30:23,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 3.2296865003198976) internal successors, (5048), 1563 states have internal predecessors, (5048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:23,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 5048 transitions. [2022-02-15 13:30:23,474 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 5048 transitions. Word has length 24 [2022-02-15 13:30:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:23,474 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 5048 transitions. [2022-02-15 13:30:23,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:23,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 5048 transitions. [2022-02-15 13:30:23,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:23,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:23,476 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:23,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-02-15 13:30:23,692 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,SelfDestructingSolverStorable157 [2022-02-15 13:30:23,692 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:23,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:23,692 INFO L85 PathProgramCache]: Analyzing trace with hash 458999027, now seen corresponding path program 143 times [2022-02-15 13:30:23,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:23,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175205454] [2022-02-15 13:30:23,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:23,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:30:23,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:23,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175205454] [2022-02-15 13:30:23,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175205454] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:23,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318306094] [2022-02-15 13:30:23,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:30:23,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:23,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:23,805 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) [2022-02-15 13:30:23,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-02-15 13:30:23,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:30:23,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:23,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:23,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:23,902 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 26 treesize of output 20 [2022-02-15 13:30:23,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:30:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:30:24,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:24,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:24,272 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 83 treesize of output 74 [2022-02-15 13:30:24,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:24,371 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 31 treesize of output 33 [2022-02-15 13:30:24,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:24,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:30:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:30:24,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318306094] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:24,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:24,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:30:24,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526685874] [2022-02-15 13:30:24,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:24,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:30:24,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:24,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:30:24,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:30:24,387 INFO L87 Difference]: Start difference. First operand 1564 states and 5048 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:24,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:24,723 INFO L93 Difference]: Finished difference Result 1746 states and 5550 transitions. [2022-02-15 13:30:24,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:30:24,723 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:30:24,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:24,742 INFO L225 Difference]: With dead ends: 1746 [2022-02-15 13:30:24,742 INFO L226 Difference]: Without dead ends: 1677 [2022-02-15 13:30:24,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:30:24,742 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 92 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:24,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 247 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:30:24,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2022-02-15 13:30:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1555. [2022-02-15 13:30:24,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1554 states have (on average 3.227155727155727) internal successors, (5015), 1554 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:24,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 5015 transitions. [2022-02-15 13:30:24,774 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 5015 transitions. Word has length 24 [2022-02-15 13:30:24,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:24,774 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 5015 transitions. [2022-02-15 13:30:24,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:24,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 5015 transitions. [2022-02-15 13:30:24,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:24,776 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:24,776 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:24,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:24,976 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,SelfDestructingSolverStorable158 [2022-02-15 13:30:24,976 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:24,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1588355917, now seen corresponding path program 144 times [2022-02-15 13:30:24,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:24,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819840550] [2022-02-15 13:30:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:24,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:30:25,143 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:25,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819840550] [2022-02-15 13:30:25,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819840550] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:25,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475528476] [2022-02-15 13:30:25,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:30:25,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:25,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:25,144 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) [2022-02-15 13:30:25,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-02-15 13:30:25,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:30:25,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:25,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:25,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:25,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:30:25,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:25,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:30:25,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:25,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:30:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:30:25,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:25,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:25,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:30:26,017 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:26,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:30:26,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:26,021 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 25 treesize of output 27 [2022-02-15 13:30:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:30:26,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475528476] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:26,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:26,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:30:26,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100964902] [2022-02-15 13:30:26,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:26,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:30:26,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:26,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:30:26,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:30:26,046 INFO L87 Difference]: Start difference. First operand 1555 states and 5015 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2022-02-15 13:30:26,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:26,317 INFO L93 Difference]: Finished difference Result 1705 states and 5454 transitions. [2022-02-15 13:30:26,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:30:26,317 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 24 [2022-02-15 13:30:26,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:26,320 INFO L225 Difference]: With dead ends: 1705 [2022-02-15 13:30:26,320 INFO L226 Difference]: Without dead ends: 1690 [2022-02-15 13:30:26,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:26,320 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:26,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 245 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 776 Invalid, 0 Unknown, 127 Unchecked, 0.2s Time] [2022-02-15 13:30:26,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2022-02-15 13:30:26,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1555. [2022-02-15 13:30:26,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1554 states have (on average 3.227155727155727) internal successors, (5015), 1554 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 5015 transitions. [2022-02-15 13:30:26,338 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 5015 transitions. Word has length 24 [2022-02-15 13:30:26,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:26,338 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 5015 transitions. [2022-02-15 13:30:26,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2022-02-15 13:30:26,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 5015 transitions. [2022-02-15 13:30:26,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:26,340 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:26,340 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:26,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:26,554 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,SelfDestructingSolverStorable159 [2022-02-15 13:30:26,555 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:26,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:26,555 INFO L85 PathProgramCache]: Analyzing trace with hash -873204247, now seen corresponding path program 145 times [2022-02-15 13:30:26,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:26,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664717178] [2022-02-15 13:30:26,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:26,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:26,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:26,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664717178] [2022-02-15 13:30:26,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664717178] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:26,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969042949] [2022-02-15 13:30:26,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:30:26,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:26,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:26,727 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) [2022-02-15 13:30:26,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-02-15 13:30:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:26,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:30:26,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:26,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:26,891 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:30:26,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:26,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:30:26,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:26,929 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:30:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:26,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:27,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:27,325 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 110 treesize of output 98 [2022-02-15 13:30:27,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:27,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:30:27,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:27,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:30:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:27,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969042949] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:27,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:27,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:30:27,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341175548] [2022-02-15 13:30:27,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:27,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:30:27,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:27,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:30:27,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:30:27,509 INFO L87 Difference]: Start difference. First operand 1555 states and 5015 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) [2022-02-15 13:30:28,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:28,209 INFO L93 Difference]: Finished difference Result 1935 states and 6006 transitions. [2022-02-15 13:30:28,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:30:28,210 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 24 [2022-02-15 13:30:28,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:28,213 INFO L225 Difference]: With dead ends: 1935 [2022-02-15 13:30:28,213 INFO L226 Difference]: Without dead ends: 1751 [2022-02-15 13:30:28,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:30:28,213 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:28,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 298 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 835 Invalid, 0 Unknown, 31 Unchecked, 0.3s Time] [2022-02-15 13:30:28,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2022-02-15 13:30:28,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1562. [2022-02-15 13:30:28,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.230621396540679) internal successors, (5043), 1561 states have internal predecessors, (5043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:28,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5043 transitions. [2022-02-15 13:30:28,234 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5043 transitions. Word has length 24 [2022-02-15 13:30:28,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:28,234 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 5043 transitions. [2022-02-15 13:30:28,235 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) [2022-02-15 13:30:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5043 transitions. [2022-02-15 13:30:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:28,237 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:28,237 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:28,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:28,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:28,447 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash -286288645, now seen corresponding path program 146 times [2022-02-15 13:30:28,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:28,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201101206] [2022-02-15 13:30:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:28,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:28,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:28,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201101206] [2022-02-15 13:30:28,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201101206] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:28,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321787591] [2022-02-15 13:30:28,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:30:28,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:28,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:28,600 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) [2022-02-15 13:30:28,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-02-15 13:30:28,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:30:28,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:28,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:28,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:28,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:28,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:30:28,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:28,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 23 [2022-02-15 13:30:28,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:28,823 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-02-15 13:30:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:28,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:29,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:29,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:30:29,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:29,313 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 31 treesize of output 33 [2022-02-15 13:30:29,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:29,316 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 25 treesize of output 27 [2022-02-15 13:30:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:29,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321787591] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:29,341 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:29,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:30:29,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019304889] [2022-02-15 13:30:29,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:29,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:30:29,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:29,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:30:29,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:29,342 INFO L87 Difference]: Start difference. First operand 1562 states and 5043 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:29,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:29,516 INFO L93 Difference]: Finished difference Result 1637 states and 5236 transitions. [2022-02-15 13:30:29,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:30:29,516 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:30:29,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:29,519 INFO L225 Difference]: With dead ends: 1637 [2022-02-15 13:30:29,519 INFO L226 Difference]: Without dead ends: 1630 [2022-02-15 13:30:29,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:30:29,519 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 50 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:29,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 216 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 328 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2022-02-15 13:30:29,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2022-02-15 13:30:29,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1590. [2022-02-15 13:30:29,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.226557583385777) internal successors, (5127), 1589 states have internal predecessors, (5127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:29,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5127 transitions. [2022-02-15 13:30:29,536 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5127 transitions. Word has length 24 [2022-02-15 13:30:29,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:29,537 INFO L470 AbstractCegarLoop]: Abstraction has 1590 states and 5127 transitions. [2022-02-15 13:30:29,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:29,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5127 transitions. [2022-02-15 13:30:29,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:29,539 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:29,539 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:29,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-02-15 13:30:29,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:29,752 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:29,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:29,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1830654085, now seen corresponding path program 147 times [2022-02-15 13:30:29,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:29,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509708413] [2022-02-15 13:30:29,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:29,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:29,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:29,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509708413] [2022-02-15 13:30:29,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509708413] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:29,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263078868] [2022-02-15 13:30:29,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:30:29,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:29,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:29,915 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) [2022-02-15 13:30:29,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-02-15 13:30:29,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:30:29,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:29,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:29,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:30,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:30,102 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:30:30,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:30,156 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:30:30,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:30,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 12 [2022-02-15 13:30:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:30,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:30,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:30,485 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:30:30,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:30,705 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 31 treesize of output 33 [2022-02-15 13:30:30,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:30,708 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 25 treesize of output 27 [2022-02-15 13:30:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:30,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263078868] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:30,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:30,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:30:30,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654748649] [2022-02-15 13:30:30,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:30,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:30:30,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:30,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:30:30,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:30,732 INFO L87 Difference]: Start difference. First operand 1590 states and 5127 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:30,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:30,914 INFO L93 Difference]: Finished difference Result 1633 states and 5228 transitions. [2022-02-15 13:30:30,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:30:30,914 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:30:30,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:30,917 INFO L225 Difference]: With dead ends: 1633 [2022-02-15 13:30:30,917 INFO L226 Difference]: Without dead ends: 1630 [2022-02-15 13:30:30,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:30:30,917 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:30,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 183 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 330 Invalid, 0 Unknown, 126 Unchecked, 0.1s Time] [2022-02-15 13:30:30,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1630 states. [2022-02-15 13:30:30,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1630 to 1588. [2022-02-15 13:30:30,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 3.2281033396345307) internal successors, (5123), 1587 states have internal predecessors, (5123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 5123 transitions. [2022-02-15 13:30:30,940 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 5123 transitions. Word has length 24 [2022-02-15 13:30:30,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:30,940 INFO L470 AbstractCegarLoop]: Abstraction has 1588 states and 5123 transitions. [2022-02-15 13:30:30,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 5123 transitions. [2022-02-15 13:30:30,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:30,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:30,942 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:30,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:31,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:31,158 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:31,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:31,159 INFO L85 PathProgramCache]: Analyzing trace with hash -961670573, now seen corresponding path program 148 times [2022-02-15 13:30:31,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:31,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648241521] [2022-02-15 13:30:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:31,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:31,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:31,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648241521] [2022-02-15 13:30:31,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648241521] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:31,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669123852] [2022-02-15 13:30:31,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:30:31,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:31,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:31,294 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) [2022-02-15 13:30:31,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-02-15 13:30:31,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:30:31,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:31,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:30:31,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:31,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:31,480 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:30:31,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:31,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:30:31,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:31,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 17 [2022-02-15 13:30:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:31,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:31,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:31,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 101 [2022-02-15 13:30:32,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:32,147 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 35 treesize of output 37 [2022-02-15 13:30:32,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:32,150 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 29 treesize of output 31 [2022-02-15 13:30:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:32,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669123852] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:32,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:32,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:30:32,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791307802] [2022-02-15 13:30:32,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:32,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:30:32,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:32,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:30:32,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:32,173 INFO L87 Difference]: Start difference. First operand 1588 states and 5123 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:32,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:32,317 INFO L93 Difference]: Finished difference Result 1639 states and 5220 transitions. [2022-02-15 13:30:32,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:30:32,318 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:30:32,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:32,320 INFO L225 Difference]: With dead ends: 1639 [2022-02-15 13:30:32,321 INFO L226 Difference]: Without dead ends: 1589 [2022-02-15 13:30:32,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:32,321 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:32,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 207 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 330 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2022-02-15 13:30:32,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2022-02-15 13:30:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1574. [2022-02-15 13:30:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 3.218054672600127) internal successors, (5062), 1573 states have internal predecessors, (5062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:32,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 5062 transitions. [2022-02-15 13:30:32,361 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 5062 transitions. Word has length 24 [2022-02-15 13:30:32,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:32,361 INFO L470 AbstractCegarLoop]: Abstraction has 1574 states and 5062 transitions. [2022-02-15 13:30:32,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:32,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 5062 transitions. [2022-02-15 13:30:32,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:32,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:32,363 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:32,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-02-15 13:30:32,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:32,567 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:32,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:32,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1152180817, now seen corresponding path program 149 times [2022-02-15 13:30:32,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:32,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148063592] [2022-02-15 13:30:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:32,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:32,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:32,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148063592] [2022-02-15 13:30:32,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148063592] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:32,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807467926] [2022-02-15 13:30:32,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:30:32,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:32,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:32,720 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) [2022-02-15 13:30:32,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-02-15 13:30:32,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:30:32,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:32,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:32,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:32,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:32,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:30:32,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:32,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:30:32,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:32,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:30:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:32,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:33,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:33,241 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 73 treesize of output 66 [2022-02-15 13:30:33,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:33,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:30:33,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:33,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:30:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:33,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807467926] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:33,411 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:33,411 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:30:33,411 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811341633] [2022-02-15 13:30:33,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:33,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:30:33,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:33,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:30:33,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:30:33,412 INFO L87 Difference]: Start difference. First operand 1574 states and 5062 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2022-02-15 13:30:33,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:33,578 INFO L93 Difference]: Finished difference Result 1603 states and 5135 transitions. [2022-02-15 13:30:33,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:30:33,578 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 24 [2022-02-15 13:30:33,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:33,580 INFO L225 Difference]: With dead ends: 1603 [2022-02-15 13:30:33,581 INFO L226 Difference]: Without dead ends: 1596 [2022-02-15 13:30:33,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:30:33,581 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:33,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 169 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 466 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-02-15 13:30:33,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2022-02-15 13:30:33,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1575. [2022-02-15 13:30:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.217916137229987) internal successors, (5065), 1574 states have internal predecessors, (5065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5065 transitions. [2022-02-15 13:30:33,597 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5065 transitions. Word has length 24 [2022-02-15 13:30:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:33,597 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5065 transitions. [2022-02-15 13:30:33,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2022-02-15 13:30:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5065 transitions. [2022-02-15 13:30:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:33,599 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:33,599 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:33,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:33,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:33,815 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:33,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:33,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1739096419, now seen corresponding path program 150 times [2022-02-15 13:30:33,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:33,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116169211] [2022-02-15 13:30:33,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:33,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:33,910 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:33,910 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:33,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116169211] [2022-02-15 13:30:33,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116169211] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:33,910 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411184896] [2022-02-15 13:30:33,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:30:33,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:33,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:33,911 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) [2022-02-15 13:30:33,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-02-15 13:30:33,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:30:33,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:33,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 13:30:33,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:34,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:34,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:30:34,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:34,277 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:30:34,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:34,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-02-15 13:30:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:30:34,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:34,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:34,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-15 13:30:35,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:35,136 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 35 treesize of output 37 [2022-02-15 13:30:35,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:35,140 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 29 treesize of output 31 [2022-02-15 13:30:35,164 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:30:35,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411184896] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:35,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:35,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 28 [2022-02-15 13:30:35,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630464519] [2022-02-15 13:30:35,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:35,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:30:35,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:35,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:30:35,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:30:35,165 INFO L87 Difference]: Start difference. First operand 1575 states and 5065 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:35,746 INFO L93 Difference]: Finished difference Result 1668 states and 5314 transitions. [2022-02-15 13:30:35,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:30:35,746 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:30:35,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:35,749 INFO L225 Difference]: With dead ends: 1668 [2022-02-15 13:30:35,749 INFO L226 Difference]: Without dead ends: 1658 [2022-02-15 13:30:35,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:30:35,750 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:35,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 327 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 642 Invalid, 0 Unknown, 192 Unchecked, 0.3s Time] [2022-02-15 13:30:35,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2022-02-15 13:30:35,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1577. [2022-02-15 13:30:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1576 states have (on average 3.2151015228426396) internal successors, (5067), 1576 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 5067 transitions. [2022-02-15 13:30:35,767 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 5067 transitions. Word has length 24 [2022-02-15 13:30:35,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:35,767 INFO L470 AbstractCegarLoop]: Abstraction has 1577 states and 5067 transitions. [2022-02-15 13:30:35,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:35,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 5067 transitions. [2022-02-15 13:30:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:35,769 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:35,769 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:35,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-02-15 13:30:35,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:35,983 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:35,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1063714491, now seen corresponding path program 151 times [2022-02-15 13:30:35,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:35,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907163274] [2022-02-15 13:30:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:35,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:36,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:36,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907163274] [2022-02-15 13:30:36,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907163274] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:36,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559223011] [2022-02-15 13:30:36,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:30:36,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:36,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:36,172 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) [2022-02-15 13:30:36,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-02-15 13:30:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:36,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:30:36,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:36,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:36,393 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:30:36,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:36,505 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:30:36,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:36,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-02-15 13:30:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:36,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:36,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:36,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-15 13:30:37,153 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:37,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:30:37,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:37,156 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 29 treesize of output 31 [2022-02-15 13:30:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:37,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559223011] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:37,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:37,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:30:37,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378447702] [2022-02-15 13:30:37,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:37,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:30:37,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:37,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:30:37,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:37,176 INFO L87 Difference]: Start difference. First operand 1577 states and 5067 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:37,351 INFO L93 Difference]: Finished difference Result 1600 states and 5123 transitions. [2022-02-15 13:30:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:30:37,351 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:30:37,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:37,354 INFO L225 Difference]: With dead ends: 1600 [2022-02-15 13:30:37,354 INFO L226 Difference]: Without dead ends: 1593 [2022-02-15 13:30:37,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:30:37,354 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:37,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 200 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 483 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-02-15 13:30:37,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2022-02-15 13:30:37,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1574. [2022-02-15 13:30:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 3.218054672600127) internal successors, (5062), 1573 states have internal predecessors, (5062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 5062 transitions. [2022-02-15 13:30:37,370 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 5062 transitions. Word has length 24 [2022-02-15 13:30:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:37,371 INFO L470 AbstractCegarLoop]: Abstraction has 1574 states and 5062 transitions. [2022-02-15 13:30:37,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 5062 transitions. [2022-02-15 13:30:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:37,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:37,373 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:37,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:37,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-02-15 13:30:37,587 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:37,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2023266851, now seen corresponding path program 152 times [2022-02-15 13:30:37,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:37,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082615031] [2022-02-15 13:30:37,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:37,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:37,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:37,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082615031] [2022-02-15 13:30:37,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082615031] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:37,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141379783] [2022-02-15 13:30:37,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:30:37,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:37,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:37,686 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) [2022-02-15 13:30:37,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-02-15 13:30:37,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:30:37,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:37,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:37,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:37,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:37,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:30:37,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:37,887 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:30:37,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:37,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 treesize of output 14 [2022-02-15 13:30:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:37,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:38,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:38,169 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 141 treesize of output 121 [2022-02-15 13:30:38,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:38,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:30:38,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:38,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:30:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:38,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141379783] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:38,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:38,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:30:38,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62680622] [2022-02-15 13:30:38,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:38,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:30:38,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:38,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:30:38,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:30:38,347 INFO L87 Difference]: Start difference. First operand 1574 states and 5062 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-02-15 13:30:38,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:38,506 INFO L93 Difference]: Finished difference Result 1646 states and 5245 transitions. [2022-02-15 13:30:38,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:30:38,507 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 24 [2022-02-15 13:30:38,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:38,509 INFO L225 Difference]: With dead ends: 1646 [2022-02-15 13:30:38,509 INFO L226 Difference]: Without dead ends: 1619 [2022-02-15 13:30:38,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:38,510 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:38,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 216 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 408 Invalid, 0 Unknown, 279 Unchecked, 0.1s Time] [2022-02-15 13:30:38,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2022-02-15 13:30:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1562. [2022-02-15 13:30:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.2299807815502883) internal successors, (5042), 1561 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:38,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5042 transitions. [2022-02-15 13:30:38,527 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5042 transitions. Word has length 24 [2022-02-15 13:30:38,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:38,527 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 5042 transitions. [2022-02-15 13:30:38,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-02-15 13:30:38,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5042 transitions. [2022-02-15 13:30:38,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:38,529 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:38,529 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:38,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:38,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-02-15 13:30:38,745 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:38,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:38,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1263413361, now seen corresponding path program 153 times [2022-02-15 13:30:38,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:38,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740465310] [2022-02-15 13:30:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:38,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:38,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:30:38,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:38,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740465310] [2022-02-15 13:30:38,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740465310] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:38,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9016447] [2022-02-15 13:30:38,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:30:38,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:38,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:38,859 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) [2022-02-15 13:30:38,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-02-15 13:30:38,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:30:38,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:38,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:38,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:38,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:30:38,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:30:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:30:39,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:39,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:39,391 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 143 treesize of output 123 [2022-02-15 13:30:39,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:39,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:30:39,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:39,528 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 25 treesize of output 27 [2022-02-15 13:30:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:30:39,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9016447] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:39,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:39,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:30:39,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858497783] [2022-02-15 13:30:39,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:39,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:30:39,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:39,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:30:39,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:30:39,539 INFO L87 Difference]: Start difference. First operand 1562 states and 5042 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) [2022-02-15 13:30:39,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:39,842 INFO L93 Difference]: Finished difference Result 1803 states and 5710 transitions. [2022-02-15 13:30:39,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:30:39,842 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 24 [2022-02-15 13:30:39,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:39,845 INFO L225 Difference]: With dead ends: 1803 [2022-02-15 13:30:39,845 INFO L226 Difference]: Without dead ends: 1749 [2022-02-15 13:30:39,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:39,845 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:39,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 183 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:30:39,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2022-02-15 13:30:39,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1562. [2022-02-15 13:30:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.2299807815502883) internal successors, (5042), 1561 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:39,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5042 transitions. [2022-02-15 13:30:39,898 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5042 transitions. Word has length 24 [2022-02-15 13:30:39,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:39,898 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 5042 transitions. [2022-02-15 13:30:39,898 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) [2022-02-15 13:30:39,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5042 transitions. [2022-02-15 13:30:39,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:39,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:39,901 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:39,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:40,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-02-15 13:30:40,117 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:40,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:40,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1454965027, now seen corresponding path program 154 times [2022-02-15 13:30:40,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:40,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085166323] [2022-02-15 13:30:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:40,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:40,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:40,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085166323] [2022-02-15 13:30:40,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085166323] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:40,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669808501] [2022-02-15 13:30:40,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:30:40,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:40,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:40,271 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) [2022-02-15 13:30:40,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-02-15 13:30:40,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:30:40,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:40,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:30:40,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:40,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:40,384 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:30:40,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:40,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:30:40,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:40,436 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:30:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:40,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:41,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:41,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-02-15 13:30:41,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:41,219 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 35 treesize of output 37 [2022-02-15 13:30:41,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:41,223 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 29 treesize of output 31 [2022-02-15 13:30:41,243 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:41,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669808501] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:41,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:41,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:30:41,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556139325] [2022-02-15 13:30:41,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:41,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:30:41,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:41,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:30:41,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:41,244 INFO L87 Difference]: Start difference. First operand 1562 states and 5042 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:42,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:42,688 INFO L93 Difference]: Finished difference Result 2218 states and 6713 transitions. [2022-02-15 13:30:42,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 13:30:42,688 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:30:42,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:42,691 INFO L225 Difference]: With dead ends: 2218 [2022-02-15 13:30:42,691 INFO L226 Difference]: Without dead ends: 2045 [2022-02-15 13:30:42,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:30:42,692 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 256 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:42,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 352 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 770 Invalid, 0 Unknown, 137 Unchecked, 0.4s Time] [2022-02-15 13:30:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2022-02-15 13:30:42,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1566. [2022-02-15 13:30:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.230670926517572) internal successors, (5056), 1565 states have internal predecessors, (5056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:42,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5056 transitions. [2022-02-15 13:30:42,713 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5056 transitions. Word has length 24 [2022-02-15 13:30:42,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:42,713 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 5056 transitions. [2022-02-15 13:30:42,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:42,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5056 transitions. [2022-02-15 13:30:42,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:42,715 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:42,716 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:42,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:42,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:42,919 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:42,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:42,920 INFO L85 PathProgramCache]: Analyzing trace with hash -949507619, now seen corresponding path program 155 times [2022-02-15 13:30:42,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:42,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498630707] [2022-02-15 13:30:42,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:42,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:43,068 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:43,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:43,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498630707] [2022-02-15 13:30:43,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498630707] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:43,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511437089] [2022-02-15 13:30:43,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:30:43,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:43,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:43,069 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) [2022-02-15 13:30:43,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-02-15 13:30:43,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:30:43,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:43,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:43,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:43,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:30:43,201 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 43 treesize of output 37 [2022-02-15 13:30:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:43,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:43,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:43,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:30:44,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:44,099 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 31 treesize of output 33 [2022-02-15 13:30:44,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:44,102 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 25 treesize of output 27 [2022-02-15 13:30:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:44,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511437089] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:44,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:44,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:30:44,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50872788] [2022-02-15 13:30:44,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:44,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:30:44,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:44,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:30:44,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:44,117 INFO L87 Difference]: Start difference. First operand 1566 states and 5056 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:45,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:45,317 INFO L93 Difference]: Finished difference Result 2147 states and 6639 transitions. [2022-02-15 13:30:45,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:30:45,318 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:30:45,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:45,322 INFO L225 Difference]: With dead ends: 2147 [2022-02-15 13:30:45,322 INFO L226 Difference]: Without dead ends: 1986 [2022-02-15 13:30:45,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:30:45,323 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 154 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:45,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 292 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:30:45,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2022-02-15 13:30:45,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1582. [2022-02-15 13:30:45,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.2359266287160025) internal successors, (5116), 1581 states have internal predecessors, (5116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:45,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5116 transitions. [2022-02-15 13:30:45,345 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5116 transitions. Word has length 24 [2022-02-15 13:30:45,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:45,345 INFO L470 AbstractCegarLoop]: Abstraction has 1582 states and 5116 transitions. [2022-02-15 13:30:45,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5116 transitions. [2022-02-15 13:30:45,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:45,347 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:45,347 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:45,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:45,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:45,564 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:45,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:45,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1044985101, now seen corresponding path program 156 times [2022-02-15 13:30:45,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:45,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416397277] [2022-02-15 13:30:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:45,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:45,780 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:45,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416397277] [2022-02-15 13:30:45,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416397277] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:45,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353557917] [2022-02-15 13:30:45,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:30:45,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:45,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:45,782 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) [2022-02-15 13:30:45,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-02-15 13:30:45,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:30:45,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:45,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:45,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:45,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:45,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:30:46,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:46,033 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:30:46,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:46,036 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:30:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:46,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:46,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:46,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-15 13:30:46,805 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:46,805 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 31 treesize of output 33 [2022-02-15 13:30:46,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:46,808 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 25 treesize of output 27 [2022-02-15 13:30:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:46,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353557917] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:46,820 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:46,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:30:46,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81982423] [2022-02-15 13:30:46,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:46,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:30:46,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:46,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:30:46,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:46,821 INFO L87 Difference]: Start difference. First operand 1582 states and 5116 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:47,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:47,235 INFO L93 Difference]: Finished difference Result 1767 states and 5599 transitions. [2022-02-15 13:30:47,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:30:47,235 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:30:47,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:47,238 INFO L225 Difference]: With dead ends: 1767 [2022-02-15 13:30:47,238 INFO L226 Difference]: Without dead ends: 1682 [2022-02-15 13:30:47,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:30:47,238 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 82 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:47,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 156 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 419 Invalid, 0 Unknown, 178 Unchecked, 0.1s Time] [2022-02-15 13:30:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-02-15 13:30:47,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1581. [2022-02-15 13:30:47,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 3.231645569620253) internal successors, (5106), 1580 states have internal predecessors, (5106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 5106 transitions. [2022-02-15 13:30:47,257 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 5106 transitions. Word has length 24 [2022-02-15 13:30:47,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:47,257 INFO L470 AbstractCegarLoop]: Abstraction has 1581 states and 5106 transitions. [2022-02-15 13:30:47,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 5106 transitions. [2022-02-15 13:30:47,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:47,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:47,259 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:47,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:47,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:47,471 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:47,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:47,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1175917381, now seen corresponding path program 157 times [2022-02-15 13:30:47,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:47,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073358273] [2022-02-15 13:30:47,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:47,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:47,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:47,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073358273] [2022-02-15 13:30:47,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073358273] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:47,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571376341] [2022-02-15 13:30:47,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:30:47,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:47,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:47,568 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) [2022-02-15 13:30:47,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-02-15 13:30:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:47,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:47,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:47,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:47,669 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:30:47,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:47,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 23 [2022-02-15 13:30:47,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:47,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-02-15 13:30:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:47,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:48,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:48,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:30:48,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:48,486 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 31 treesize of output 33 [2022-02-15 13:30:48,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:48,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:30:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:48,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571376341] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:48,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:48,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:30:48,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750518276] [2022-02-15 13:30:48,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:48,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:30:48,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:48,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:30:48,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:48,515 INFO L87 Difference]: Start difference. First operand 1581 states and 5106 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:48,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:48,768 INFO L93 Difference]: Finished difference Result 1684 states and 5381 transitions. [2022-02-15 13:30:48,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:30:48,769 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:30:48,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:48,771 INFO L225 Difference]: With dead ends: 1684 [2022-02-15 13:30:48,771 INFO L226 Difference]: Without dead ends: 1653 [2022-02-15 13:30:48,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:30:48,772 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 97 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:48,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 209 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 427 Invalid, 0 Unknown, 397 Unchecked, 0.1s Time] [2022-02-15 13:30:48,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2022-02-15 13:30:48,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1574. [2022-02-15 13:30:48,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 3.22822631913541) internal successors, (5078), 1573 states have internal predecessors, (5078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:48,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 5078 transitions. [2022-02-15 13:30:48,790 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 5078 transitions. Word has length 24 [2022-02-15 13:30:48,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:48,790 INFO L470 AbstractCegarLoop]: Abstraction has 1574 states and 5078 transitions. [2022-02-15 13:30:48,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:48,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 5078 transitions. [2022-02-15 13:30:48,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:48,792 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:48,792 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:48,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:49,008 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,SelfDestructingSolverStorable172 [2022-02-15 13:30:49,008 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:49,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:49,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1380524797, now seen corresponding path program 158 times [2022-02-15 13:30:49,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:49,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763522097] [2022-02-15 13:30:49,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:49,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:49,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:49,105 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:49,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:49,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763522097] [2022-02-15 13:30:49,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763522097] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:49,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516274447] [2022-02-15 13:30:49,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:30:49,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:49,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:49,107 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) [2022-02-15 13:30:49,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-02-15 13:30:49,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:30:49,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:49,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:49,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:49,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:49,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:30:49,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:49,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:30:49,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:49,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 12 treesize of output 3 [2022-02-15 13:30:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:49,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:49,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:49,648 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 141 treesize of output 121 [2022-02-15 13:30:49,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:49,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:30:49,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:49,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:30:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:49,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516274447] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:49,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:49,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:30:49,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746481291] [2022-02-15 13:30:49,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:49,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:30:49,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:49,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:30:49,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:30:49,811 INFO L87 Difference]: Start difference. First operand 1574 states and 5078 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:50,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:50,073 INFO L93 Difference]: Finished difference Result 1714 states and 5438 transitions. [2022-02-15 13:30:50,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:30:50,073 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:30:50,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:50,076 INFO L225 Difference]: With dead ends: 1714 [2022-02-15 13:30:50,076 INFO L226 Difference]: Without dead ends: 1656 [2022-02-15 13:30:50,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:30:50,076 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:50,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 211 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 570 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-02-15 13:30:50,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2022-02-15 13:30:50,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1564. [2022-02-15 13:30:50,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 3.231605886116443) internal successors, (5051), 1563 states have internal predecessors, (5051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 5051 transitions. [2022-02-15 13:30:50,095 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 5051 transitions. Word has length 24 [2022-02-15 13:30:50,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:50,095 INFO L470 AbstractCegarLoop]: Abstraction has 1564 states and 5051 transitions. [2022-02-15 13:30:50,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:30:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 5051 transitions. [2022-02-15 13:30:50,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:50,097 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:50,097 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:50,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:50,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:50,313 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:50,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:50,313 INFO L85 PathProgramCache]: Analyzing trace with hash 61894819, now seen corresponding path program 159 times [2022-02-15 13:30:50,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:50,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708431559] [2022-02-15 13:30:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:50,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:50,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:50,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708431559] [2022-02-15 13:30:50,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708431559] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:50,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211435254] [2022-02-15 13:30:50,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:30:50,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:50,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:50,404 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) [2022-02-15 13:30:50,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-02-15 13:30:50,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:30:50,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:50,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:50,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:50,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-15 13:30:50,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:30:50,569 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:50,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:50,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:50,892 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 57 treesize of output 57 [2022-02-15 13:30:51,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:51,092 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 87 treesize of output 78 [2022-02-15 13:30:51,097 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:51,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 60 [2022-02-15 13:30:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:51,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211435254] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:51,203 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:51,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:30:51,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102762584] [2022-02-15 13:30:51,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:51,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:30:51,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:51,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:30:51,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:30:51,204 INFO L87 Difference]: Start difference. First operand 1564 states and 5051 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) [2022-02-15 13:30:51,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:51,647 INFO L93 Difference]: Finished difference Result 1663 states and 5329 transitions. [2022-02-15 13:30:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:30:51,647 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 24 [2022-02-15 13:30:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:51,650 INFO L225 Difference]: With dead ends: 1663 [2022-02-15 13:30:51,650 INFO L226 Difference]: Without dead ends: 1604 [2022-02-15 13:30:51,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:30:51,650 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:51,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 184 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:30:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2022-02-15 13:30:51,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1568. [2022-02-15 13:30:51,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.231014677728143) internal successors, (5063), 1567 states have internal predecessors, (5063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:51,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 5063 transitions. [2022-02-15 13:30:51,669 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 5063 transitions. Word has length 24 [2022-02-15 13:30:51,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:51,669 INFO L470 AbstractCegarLoop]: Abstraction has 1568 states and 5063 transitions. [2022-02-15 13:30:51,669 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) [2022-02-15 13:30:51,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 5063 transitions. [2022-02-15 13:30:51,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:51,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:51,671 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:51,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:51,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:51,887 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:51,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:51,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1225827993, now seen corresponding path program 160 times [2022-02-15 13:30:51,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:51,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528774374] [2022-02-15 13:30:51,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:51,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:52,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:52,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528774374] [2022-02-15 13:30:52,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528774374] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:52,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655761618] [2022-02-15 13:30:52,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:30:52,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:52,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:52,070 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) [2022-02-15 13:30:52,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-02-15 13:30:52,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:30:52,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:52,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:52,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:52,231 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 53 treesize of output 45 [2022-02-15 13:30:52,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:52,302 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:30:52,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:52,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:30:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:52,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:52,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:52,833 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 77 treesize of output 75 [2022-02-15 13:30:53,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:53,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 127 [2022-02-15 13:30:53,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:53,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 99 [2022-02-15 13:30:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:53,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655761618] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:53,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:53,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:30:53,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541456536] [2022-02-15 13:30:53,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:53,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:30:53,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:53,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:30:53,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:30:53,204 INFO L87 Difference]: Start difference. First operand 1568 states and 5063 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-02-15 13:30:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:53,550 INFO L93 Difference]: Finished difference Result 1680 states and 5420 transitions. [2022-02-15 13:30:53,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:30:53,551 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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 24 [2022-02-15 13:30:53,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:53,554 INFO L225 Difference]: With dead ends: 1680 [2022-02-15 13:30:53,554 INFO L226 Difference]: Without dead ends: 1645 [2022-02-15 13:30:53,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:30:53,554 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:53,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 232 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 762 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2022-02-15 13:30:53,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-02-15 13:30:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1568. [2022-02-15 13:30:53,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.231014677728143) internal successors, (5063), 1567 states have internal predecessors, (5063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 5063 transitions. [2022-02-15 13:30:53,571 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 5063 transitions. Word has length 24 [2022-02-15 13:30:53,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:53,571 INFO L470 AbstractCegarLoop]: Abstraction has 1568 states and 5063 transitions. [2022-02-15 13:30:53,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-02-15 13:30:53,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 5063 transitions. [2022-02-15 13:30:53,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:53,573 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:53,573 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:53,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-02-15 13:30:53,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:53,775 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:53,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1593521725, now seen corresponding path program 161 times [2022-02-15 13:30:53,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:53,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415583175] [2022-02-15 13:30:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:53,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:53,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:53,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415583175] [2022-02-15 13:30:53,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415583175] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:53,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397693680] [2022-02-15 13:30:53,949 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:30:53,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:53,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:53,950 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) [2022-02-15 13:30:53,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-02-15 13:30:53,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:30:53,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:53,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:53,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:54,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:54,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-02-15 13:30:54,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:54,166 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-15 13:30:54,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:54,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:30:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:54,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:54,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:54,585 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 77 treesize of output 75 [2022-02-15 13:30:54,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:54,769 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 144 treesize of output 124 [2022-02-15 13:30:54,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:54,773 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 116 treesize of output 96 [2022-02-15 13:30:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:54,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397693680] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:54,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:54,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:30:54,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425298081] [2022-02-15 13:30:54,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:54,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:30:54,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:54,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:30:54,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:30:54,842 INFO L87 Difference]: Start difference. First operand 1568 states and 5063 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-02-15 13:30:55,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:55,056 INFO L93 Difference]: Finished difference Result 1692 states and 5393 transitions. [2022-02-15 13:30:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:30:55,056 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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 24 [2022-02-15 13:30:55,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:55,059 INFO L225 Difference]: With dead ends: 1692 [2022-02-15 13:30:55,059 INFO L226 Difference]: Without dead ends: 1618 [2022-02-15 13:30:55,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:30:55,059 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:55,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 223 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 604 Invalid, 0 Unknown, 172 Unchecked, 0.2s Time] [2022-02-15 13:30:55,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2022-02-15 13:30:55,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1568. [2022-02-15 13:30:55,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 3.231014677728143) internal successors, (5063), 1567 states have internal predecessors, (5063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:55,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 5063 transitions. [2022-02-15 13:30:55,076 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 5063 transitions. Word has length 24 [2022-02-15 13:30:55,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:55,076 INFO L470 AbstractCegarLoop]: Abstraction has 1568 states and 5063 transitions. [2022-02-15 13:30:55,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-02-15 13:30:55,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 5063 transitions. [2022-02-15 13:30:55,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:55,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:55,078 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:55,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-02-15 13:30:55,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:55,293 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:55,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1037036391, now seen corresponding path program 162 times [2022-02-15 13:30:55,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:55,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213882564] [2022-02-15 13:30:55,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:55,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:55,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:55,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:55,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213882564] [2022-02-15 13:30:55,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213882564] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:55,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167382107] [2022-02-15 13:30:55,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:30:55,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:55,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:55,417 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) [2022-02-15 13:30:55,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-02-15 13:30:55,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:30:55,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:55,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:55,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:55,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:30:55,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:55,722 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:30:55,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:30:55,724 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:30:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:55,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:56,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:56,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 72 [2022-02-15 13:30:56,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:56,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2022-02-15 13:30:56,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:56,394 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 69 treesize of output 60 [2022-02-15 13:30:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:56,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167382107] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:56,485 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:56,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:30:56,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041330100] [2022-02-15 13:30:56,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:56,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:30:56,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:56,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:30:56,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:30:56,485 INFO L87 Difference]: Start difference. First operand 1568 states and 5063 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) [2022-02-15 13:30:56,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:56,787 INFO L93 Difference]: Finished difference Result 1665 states and 5332 transitions. [2022-02-15 13:30:56,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:30:56,788 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 24 [2022-02-15 13:30:56,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:56,790 INFO L225 Difference]: With dead ends: 1665 [2022-02-15 13:30:56,790 INFO L226 Difference]: Without dead ends: 1606 [2022-02-15 13:30:56,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:30:56,791 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:56,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 293 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 625 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2022-02-15 13:30:56,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2022-02-15 13:30:56,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1569. [2022-02-15 13:30:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1568 states have (on average 3.2315051020408165) internal successors, (5067), 1568 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:56,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 5067 transitions. [2022-02-15 13:30:56,807 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 5067 transitions. Word has length 24 [2022-02-15 13:30:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:56,808 INFO L470 AbstractCegarLoop]: Abstraction has 1569 states and 5067 transitions. [2022-02-15 13:30:56,808 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) [2022-02-15 13:30:56,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 5067 transitions. [2022-02-15 13:30:56,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:56,810 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:56,810 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:56,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-02-15 13:30:57,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-02-15 13:30:57,025 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:57,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:57,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2093997731, now seen corresponding path program 163 times [2022-02-15 13:30:57,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:57,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357921291] [2022-02-15 13:30:57,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:57,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:57,157 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:57,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357921291] [2022-02-15 13:30:57,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357921291] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:57,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638000600] [2022-02-15 13:30:57,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:30:57,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:57,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:57,158 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) [2022-02-15 13:30:57,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-02-15 13:30:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:57,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:57,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:57,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:30:57,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:30:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:57,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:57,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:57,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-02-15 13:30:57,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:57,823 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 150 treesize of output 130 [2022-02-15 13:30:57,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:57,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 102 [2022-02-15 13:30:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:57,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638000600] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:57,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:57,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:30:57,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600551468] [2022-02-15 13:30:57,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:57,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:30:57,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:57,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:30:57,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:30:57,973 INFO L87 Difference]: Start difference. First operand 1569 states and 5067 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:58,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:30:58,734 INFO L93 Difference]: Finished difference Result 1840 states and 5807 transitions. [2022-02-15 13:30:58,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:30:58,734 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:30:58,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:30:58,737 INFO L225 Difference]: With dead ends: 1840 [2022-02-15 13:30:58,737 INFO L226 Difference]: Without dead ends: 1739 [2022-02-15 13:30:58,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:30:58,738 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 78 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:30:58,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 283 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:30:58,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2022-02-15 13:30:58,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1581. [2022-02-15 13:30:58,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 3.231645569620253) internal successors, (5106), 1580 states have internal predecessors, (5106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:58,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 5106 transitions. [2022-02-15 13:30:58,757 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 5106 transitions. Word has length 24 [2022-02-15 13:30:58,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:30:58,757 INFO L470 AbstractCegarLoop]: Abstraction has 1581 states and 5106 transitions. [2022-02-15 13:30:58,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:30:58,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 5106 transitions. [2022-02-15 13:30:58,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:30:58,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:30:58,759 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:30:58,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-02-15 13:30:58,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:58,961 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:30:58,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:30:58,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1345587235, now seen corresponding path program 164 times [2022-02-15 13:30:58,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:30:58,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147286116] [2022-02-15 13:30:58,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:30:58,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:30:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:30:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:59,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:30:59,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147286116] [2022-02-15 13:30:59,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147286116] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:30:59,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923902961] [2022-02-15 13:30:59,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:30:59,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:30:59,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:30:59,152 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) [2022-02-15 13:30:59,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-02-15 13:30:59,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:30:59,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:30:59,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:30:59,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:30:59,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:30:59,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-15 13:30:59,321 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 12 treesize of output 8 [2022-02-15 13:30:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:59,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:30:59,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:59,787 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 80 treesize of output 76 [2022-02-15 13:30:59,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:59,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 77 [2022-02-15 13:30:59,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:30:59,864 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 68 treesize of output 59 [2022-02-15 13:30:59,936 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:30:59,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923902961] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:30:59,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:30:59,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:30:59,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184708047] [2022-02-15 13:30:59,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:30:59,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:30:59,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:30:59,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:30:59,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:30:59,937 INFO L87 Difference]: Start difference. First operand 1581 states and 5106 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:00,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:00,285 INFO L93 Difference]: Finished difference Result 1659 states and 5305 transitions. [2022-02-15 13:31:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:31:00,285 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:31:00,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:00,288 INFO L225 Difference]: With dead ends: 1659 [2022-02-15 13:31:00,288 INFO L226 Difference]: Without dead ends: 1604 [2022-02-15 13:31:00,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:31:00,289 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:00,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 247 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 779 Invalid, 0 Unknown, 158 Unchecked, 0.2s Time] [2022-02-15 13:31:00,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2022-02-15 13:31:00,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1573. [2022-02-15 13:31:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1573 states, 1572 states have (on average 3.231552162849873) internal successors, (5080), 1572 states have internal predecessors, (5080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:00,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 5080 transitions. [2022-02-15 13:31:00,336 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 5080 transitions. Word has length 24 [2022-02-15 13:31:00,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:00,336 INFO L470 AbstractCegarLoop]: Abstraction has 1573 states and 5080 transitions. [2022-02-15 13:31:00,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:00,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 5080 transitions. [2022-02-15 13:31:00,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:00,338 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:00,338 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:00,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:00,554 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,SelfDestructingSolverStorable179 [2022-02-15 13:31:00,555 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:00,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:00,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1126356007, now seen corresponding path program 165 times [2022-02-15 13:31:00,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:00,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768740437] [2022-02-15 13:31:00,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:00,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:00,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:00,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768740437] [2022-02-15 13:31:00,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768740437] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:00,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791331456] [2022-02-15 13:31:00,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:31:00,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:00,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:00,742 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) [2022-02-15 13:31:00,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-02-15 13:31:00,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:31:00,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:00,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:31:00,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:00,818 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 41 treesize of output 35 [2022-02-15 13:31:00,925 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 26 treesize of output 22 [2022-02-15 13:31:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:00,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:01,417 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:01,418 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 77 treesize of output 75 [2022-02-15 13:31:01,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:01,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 97 [2022-02-15 13:31:01,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:01,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 77 [2022-02-15 13:31:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:01,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791331456] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:01,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:01,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:31:01,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788157994] [2022-02-15 13:31:01,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:01,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:31:01,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:01,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:31:01,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:31:01,568 INFO L87 Difference]: Start difference. First operand 1573 states and 5080 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:02,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:02,821 INFO L93 Difference]: Finished difference Result 2110 states and 6459 transitions. [2022-02-15 13:31:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:31:02,821 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:31:02,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:02,824 INFO L225 Difference]: With dead ends: 2110 [2022-02-15 13:31:02,824 INFO L226 Difference]: Without dead ends: 1930 [2022-02-15 13:31:02,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:31:02,824 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 145 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:02,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 405 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1194 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:31:02,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2022-02-15 13:31:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1571. [2022-02-15 13:31:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 3.232484076433121) internal successors, (5075), 1570 states have internal predecessors, (5075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:02,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 5075 transitions. [2022-02-15 13:31:02,844 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 5075 transitions. Word has length 24 [2022-02-15 13:31:02,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:02,844 INFO L470 AbstractCegarLoop]: Abstraction has 1571 states and 5075 transitions. [2022-02-15 13:31:02,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:02,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 5075 transitions. [2022-02-15 13:31:02,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:02,846 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:02,846 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:02,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:03,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:03,062 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:03,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:03,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1810324647, now seen corresponding path program 166 times [2022-02-15 13:31:03,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:03,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133130509] [2022-02-15 13:31:03,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:03,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:03,195 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:03,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133130509] [2022-02-15 13:31:03,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133130509] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:03,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440712403] [2022-02-15 13:31:03,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:31:03,195 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:03,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:03,196 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) [2022-02-15 13:31:03,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-02-15 13:31:03,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:31:03,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:03,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:31:03,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:03,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:03,289 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:31:03,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:03,367 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:31:03,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:03,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:31:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:03,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:03,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:03,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2022-02-15 13:31:04,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:04,053 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 116 treesize of output 102 [2022-02-15 13:31:04,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:04,057 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 94 treesize of output 80 [2022-02-15 13:31:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:04,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440712403] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:04,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:04,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:31:04,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915438016] [2022-02-15 13:31:04,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:04,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:31:04,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:04,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:31:04,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:31:04,102 INFO L87 Difference]: Start difference. First operand 1571 states and 5075 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) [2022-02-15 13:31:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:05,398 INFO L93 Difference]: Finished difference Result 2273 states and 6911 transitions. [2022-02-15 13:31:05,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:31:05,398 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 24 [2022-02-15 13:31:05,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:05,402 INFO L225 Difference]: With dead ends: 2273 [2022-02-15 13:31:05,402 INFO L226 Difference]: Without dead ends: 2076 [2022-02-15 13:31:05,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:31:05,402 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 172 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:05,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 313 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 787 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2022-02-15 13:31:05,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2022-02-15 13:31:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1585. [2022-02-15 13:31:05,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.239267676767677) internal successors, (5131), 1584 states have internal predecessors, (5131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5131 transitions. [2022-02-15 13:31:05,424 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5131 transitions. Word has length 24 [2022-02-15 13:31:05,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:05,424 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5131 transitions. [2022-02-15 13:31:05,424 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) [2022-02-15 13:31:05,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5131 transitions. [2022-02-15 13:31:05,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:05,426 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:05,426 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:05,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-02-15 13:31:05,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:05,639 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:05,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:05,639 INFO L85 PathProgramCache]: Analyzing trace with hash 613904985, now seen corresponding path program 167 times [2022-02-15 13:31:05,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:05,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524703712] [2022-02-15 13:31:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:05,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:31:05,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:05,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524703712] [2022-02-15 13:31:05,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524703712] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:05,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925323737] [2022-02-15 13:31:05,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:31:05,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:05,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:05,855 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) [2022-02-15 13:31:05,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-02-15 13:31:05,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:31:05,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:05,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:05,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:05,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:31:06,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:06,009 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:31:06,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:06,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:31:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:31:06,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:06,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:06,985 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 69 treesize of output 67 [2022-02-15 13:31:07,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:07,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 68 [2022-02-15 13:31:07,090 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:07,091 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 59 treesize of output 52 [2022-02-15 13:31:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:31:07,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925323737] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:07,205 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:07,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:31:07,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885516044] [2022-02-15 13:31:07,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:07,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:31:07,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:07,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:31:07,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:31:07,205 INFO L87 Difference]: Start difference. First operand 1585 states and 5131 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) [2022-02-15 13:31:07,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:07,767 INFO L93 Difference]: Finished difference Result 1785 states and 5664 transitions. [2022-02-15 13:31:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:31:07,768 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 24 [2022-02-15 13:31:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:07,771 INFO L225 Difference]: With dead ends: 1785 [2022-02-15 13:31:07,771 INFO L226 Difference]: Without dead ends: 1685 [2022-02-15 13:31:07,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:31:07,771 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:07,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 256 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 803 Invalid, 0 Unknown, 122 Unchecked, 0.3s Time] [2022-02-15 13:31:07,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2022-02-15 13:31:07,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1583. [2022-02-15 13:31:07,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.2402022756005056) internal successors, (5126), 1582 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:07,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5126 transitions. [2022-02-15 13:31:07,791 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5126 transitions. Word has length 24 [2022-02-15 13:31:07,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:07,791 INFO L470 AbstractCegarLoop]: Abstraction has 1583 states and 5126 transitions. [2022-02-15 13:31:07,791 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) [2022-02-15 13:31:07,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5126 transitions. [2022-02-15 13:31:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:07,793 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:07,793 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:07,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:08,007 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,SelfDestructingSolverStorable182 [2022-02-15 13:31:08,007 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:08,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:08,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1389590713, now seen corresponding path program 168 times [2022-02-15 13:31:08,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:08,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871082950] [2022-02-15 13:31:08,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:08,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:08,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:08,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:08,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871082950] [2022-02-15 13:31:08,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871082950] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:08,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633283317] [2022-02-15 13:31:08,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:31:08,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:08,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:08,204 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) [2022-02-15 13:31:08,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-02-15 13:31:08,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:31:08,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:08,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:08,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:08,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:08,301 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:31:08,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:08,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 13:31:08,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:08,419 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:31:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:08,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:09,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:09,247 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 131 treesize of output 121 [2022-02-15 13:31:09,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:09,498 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 82 treesize of output 73 [2022-02-15 13:31:09,503 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:09,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-02-15 13:31:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:09,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633283317] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:09,625 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:09,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:31:09,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31559017] [2022-02-15 13:31:09,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:09,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:31:09,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:09,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:31:09,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:31:09,625 INFO L87 Difference]: Start difference. First operand 1583 states and 5126 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) [2022-02-15 13:31:10,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:10,134 INFO L93 Difference]: Finished difference Result 1777 states and 5626 transitions. [2022-02-15 13:31:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:31:10,134 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 24 [2022-02-15 13:31:10,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:10,137 INFO L225 Difference]: With dead ends: 1777 [2022-02-15 13:31:10,137 INFO L226 Difference]: Without dead ends: 1697 [2022-02-15 13:31:10,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:31:10,138 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 66 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:10,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 226 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 600 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-02-15 13:31:10,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2022-02-15 13:31:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1586. [2022-02-15 13:31:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 3.241640378548896) internal successors, (5138), 1585 states have internal predecessors, (5138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 5138 transitions. [2022-02-15 13:31:10,155 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 5138 transitions. Word has length 24 [2022-02-15 13:31:10,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:10,155 INFO L470 AbstractCegarLoop]: Abstraction has 1586 states and 5138 transitions. [2022-02-15 13:31:10,155 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) [2022-02-15 13:31:10,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 5138 transitions. [2022-02-15 13:31:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:10,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:10,157 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:10,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:10,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:10,371 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:10,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:10,372 INFO L85 PathProgramCache]: Analyzing trace with hash 892311847, now seen corresponding path program 169 times [2022-02-15 13:31:10,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:10,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282688916] [2022-02-15 13:31:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:10,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:10,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:10,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:10,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282688916] [2022-02-15 13:31:10,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282688916] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:10,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244333782] [2022-02-15 13:31:10,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:31:10,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:10,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:10,526 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) [2022-02-15 13:31:10,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-02-15 13:31:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:10,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:10,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:10,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:10,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:31:10,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:10,769 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:31:10,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:10,772 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:31:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:10,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:11,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:11,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-02-15 13:31:11,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:11,526 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 144 treesize of output 124 [2022-02-15 13:31:11,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:11,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 96 [2022-02-15 13:31:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:11,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244333782] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:11,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:11,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:31:11,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375703601] [2022-02-15 13:31:11,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:11,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:31:11,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:11,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:31:11,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:31:11,645 INFO L87 Difference]: Start difference. First operand 1586 states and 5138 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:12,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:12,027 INFO L93 Difference]: Finished difference Result 1677 states and 5403 transitions. [2022-02-15 13:31:12,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:31:12,027 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:31:12,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:12,030 INFO L225 Difference]: With dead ends: 1677 [2022-02-15 13:31:12,030 INFO L226 Difference]: Without dead ends: 1638 [2022-02-15 13:31:12,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:31:12,030 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:12,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 293 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 720 Invalid, 0 Unknown, 153 Unchecked, 0.3s Time] [2022-02-15 13:31:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2022-02-15 13:31:12,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1589. [2022-02-15 13:31:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1588 states have (on average 3.2405541561712847) internal successors, (5146), 1588 states have internal predecessors, (5146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:12,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 5146 transitions. [2022-02-15 13:31:12,050 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 5146 transitions. Word has length 24 [2022-02-15 13:31:12,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:12,050 INFO L470 AbstractCegarLoop]: Abstraction has 1589 states and 5146 transitions. [2022-02-15 13:31:12,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:12,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 5146 transitions. [2022-02-15 13:31:12,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:12,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:12,052 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:12,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:12,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:12,271 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:12,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:12,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1081039869, now seen corresponding path program 170 times [2022-02-15 13:31:12,271 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:12,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910045561] [2022-02-15 13:31:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:12,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:12,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:12,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910045561] [2022-02-15 13:31:12,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910045561] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:12,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610306396] [2022-02-15 13:31:12,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:31:12,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:12,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:12,445 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) [2022-02-15 13:31:12,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-02-15 13:31:12,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:31:12,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:12,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:12,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:12,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:12,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:31:12,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:12,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 13:31:12,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:12,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:31:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:12,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:13,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:13,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 121 [2022-02-15 13:31:13,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:13,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2022-02-15 13:31:13,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:13,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 56 [2022-02-15 13:31:13,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:13,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610306396] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:13,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:13,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:31:13,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126817157] [2022-02-15 13:31:13,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:13,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:31:13,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:13,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:31:13,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:31:13,358 INFO L87 Difference]: Start difference. First operand 1589 states and 5146 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:13,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:13,753 INFO L93 Difference]: Finished difference Result 1715 states and 5493 transitions. [2022-02-15 13:31:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:31:13,753 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:31:13,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:13,756 INFO L225 Difference]: With dead ends: 1715 [2022-02-15 13:31:13,756 INFO L226 Difference]: Without dead ends: 1649 [2022-02-15 13:31:13,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:31:13,756 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 187 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:13,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 195 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 627 Invalid, 0 Unknown, 187 Unchecked, 0.2s Time] [2022-02-15 13:31:13,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2022-02-15 13:31:13,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1589. [2022-02-15 13:31:13,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1588 states have (on average 3.2405541561712847) internal successors, (5146), 1588 states have internal predecessors, (5146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 5146 transitions. [2022-02-15 13:31:13,774 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 5146 transitions. Word has length 24 [2022-02-15 13:31:13,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:13,774 INFO L470 AbstractCegarLoop]: Abstraction has 1589 states and 5146 transitions. [2022-02-15 13:31:13,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 5146 transitions. [2022-02-15 13:31:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:13,776 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:13,776 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:13,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:13,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:13,990 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:13,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:13,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1180960483, now seen corresponding path program 171 times [2022-02-15 13:31:13,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:13,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033863757] [2022-02-15 13:31:13,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:13,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:14,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:14,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033863757] [2022-02-15 13:31:14,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033863757] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:14,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010917206] [2022-02-15 13:31:14,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:31:14,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:14,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:14,160 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) [2022-02-15 13:31:14,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-02-15 13:31:14,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:31:14,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:14,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:14,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:14,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:14,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:31:14,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:14,367 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-02-15 13:31:14,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:14,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-02-15 13:31:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:14,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:14,731 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:14,731 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 129 treesize of output 119 [2022-02-15 13:31:14,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:14,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 73 [2022-02-15 13:31:14,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:14,892 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 64 treesize of output 55 [2022-02-15 13:31:14,971 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:14,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010917206] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:14,971 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:14,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:31:14,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086061857] [2022-02-15 13:31:14,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:14,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:31:14,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:14,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:31:14,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:31:14,972 INFO L87 Difference]: Start difference. First operand 1589 states and 5146 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:15,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:15,270 INFO L93 Difference]: Finished difference Result 1677 states and 5399 transitions. [2022-02-15 13:31:15,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:31:15,270 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:31:15,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:15,273 INFO L225 Difference]: With dead ends: 1677 [2022-02-15 13:31:15,273 INFO L226 Difference]: Without dead ends: 1638 [2022-02-15 13:31:15,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:31:15,274 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:15,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 278 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 503 Invalid, 0 Unknown, 281 Unchecked, 0.2s Time] [2022-02-15 13:31:15,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2022-02-15 13:31:15,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1591. [2022-02-15 13:31:15,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.239622641509434) internal successors, (5151), 1590 states have internal predecessors, (5151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:15,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5151 transitions. [2022-02-15 13:31:15,291 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5151 transitions. Word has length 24 [2022-02-15 13:31:15,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:15,291 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 5151 transitions. [2022-02-15 13:31:15,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:15,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5151 transitions. [2022-02-15 13:31:15,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:15,293 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:15,293 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:15,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:15,509 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,SelfDestructingSolverStorable186 [2022-02-15 13:31:15,509 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:15,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:15,510 INFO L85 PathProgramCache]: Analyzing trace with hash 82535079, now seen corresponding path program 172 times [2022-02-15 13:31:15,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:15,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736762574] [2022-02-15 13:31:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:15,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:15,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:15,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736762574] [2022-02-15 13:31:15,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736762574] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:15,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110998250] [2022-02-15 13:31:15,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:31:15,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:15,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:15,647 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) [2022-02-15 13:31:15,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-02-15 13:31:15,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:31:15,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:15,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:15,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:15,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:15,734 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:31:15,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:15,806 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:31:15,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:15,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:31:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:15,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:16,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:16,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2022-02-15 13:31:16,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:16,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 131 [2022-02-15 13:31:16,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:16,457 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 123 treesize of output 103 [2022-02-15 13:31:16,567 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:16,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110998250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:16,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:16,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:31:16,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286125422] [2022-02-15 13:31:16,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:16,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:31:16,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:16,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:31:16,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:31:16,568 INFO L87 Difference]: Start difference. First operand 1591 states and 5151 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:17,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:17,076 INFO L93 Difference]: Finished difference Result 1757 states and 5549 transitions. [2022-02-15 13:31:17,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:31:17,076 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:31:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:17,080 INFO L225 Difference]: With dead ends: 1757 [2022-02-15 13:31:17,080 INFO L226 Difference]: Without dead ends: 1683 [2022-02-15 13:31:17,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:31:17,080 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 100 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:17,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 191 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 624 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2022-02-15 13:31:17,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2022-02-15 13:31:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1591. [2022-02-15 13:31:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.239622641509434) internal successors, (5151), 1590 states have internal predecessors, (5151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:17,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5151 transitions. [2022-02-15 13:31:17,098 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5151 transitions. Word has length 24 [2022-02-15 13:31:17,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:17,098 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 5151 transitions. [2022-02-15 13:31:17,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:17,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5151 transitions. [2022-02-15 13:31:17,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:17,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:17,100 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:17,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:17,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:17,303 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:17,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:17,304 INFO L85 PathProgramCache]: Analyzing trace with hash 299283367, now seen corresponding path program 173 times [2022-02-15 13:31:17,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:17,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604296348] [2022-02-15 13:31:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:17,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:31:17,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:17,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604296348] [2022-02-15 13:31:17,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604296348] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:17,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062080379] [2022-02-15 13:31:17,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:31:17,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:17,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:17,454 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) [2022-02-15 13:31:17,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-02-15 13:31:17,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:31:17,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:17,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:17,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:17,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:17,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:31:17,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:17,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 [2022-02-15 13:31:17,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:17,627 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-02-15 13:31:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:31:17,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:18,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:18,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 119 [2022-02-15 13:31:18,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:18,235 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 84 treesize of output 77 [2022-02-15 13:31:18,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:18,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 61 [2022-02-15 13:31:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:31:18,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062080379] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:18,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:18,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:31:18,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776589087] [2022-02-15 13:31:18,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:18,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:31:18,367 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:18,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:31:18,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:31:18,367 INFO L87 Difference]: Start difference. First operand 1591 states and 5151 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:18,636 INFO L93 Difference]: Finished difference Result 1655 states and 5326 transitions. [2022-02-15 13:31:18,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:31:18,637 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:31:18,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:18,639 INFO L225 Difference]: With dead ends: 1655 [2022-02-15 13:31:18,640 INFO L226 Difference]: Without dead ends: 1636 [2022-02-15 13:31:18,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:31:18,640 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:18,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 186 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 625 Invalid, 0 Unknown, 11 Unchecked, 0.3s Time] [2022-02-15 13:31:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1636 states. [2022-02-15 13:31:18,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1636 to 1589. [2022-02-15 13:31:18,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1588 states have (on average 3.2405541561712847) internal successors, (5146), 1588 states have internal predecessors, (5146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 5146 transitions. [2022-02-15 13:31:18,657 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 5146 transitions. Word has length 24 [2022-02-15 13:31:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:18,657 INFO L470 AbstractCegarLoop]: Abstraction has 1589 states and 5146 transitions. [2022-02-15 13:31:18,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:18,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 5146 transitions. [2022-02-15 13:31:18,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:18,659 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:18,659 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:18,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:18,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:18,868 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:18,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:18,868 INFO L85 PathProgramCache]: Analyzing trace with hash 715638361, now seen corresponding path program 174 times [2022-02-15 13:31:18,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:18,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168640612] [2022-02-15 13:31:18,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:18,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:18,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:18,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:18,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168640612] [2022-02-15 13:31:18,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168640612] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:18,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495771476] [2022-02-15 13:31:18,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:31:18,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:18,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:18,971 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) [2022-02-15 13:31:18,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-02-15 13:31:18,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:31:18,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:18,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:19,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:19,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:31:19,163 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 30 treesize of output 24 [2022-02-15 13:31:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:19,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:19,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:19,621 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 141 treesize of output 121 [2022-02-15 13:31:19,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:19,757 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 34 treesize of output 36 [2022-02-15 13:31:19,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:19,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 13:31:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:19,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495771476] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:19,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:19,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:31:19,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891197049] [2022-02-15 13:31:19,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:19,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:31:19,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:19,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:31:19,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:31:19,786 INFO L87 Difference]: Start difference. First operand 1589 states and 5146 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) [2022-02-15 13:31:20,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:20,252 INFO L93 Difference]: Finished difference Result 1713 states and 5513 transitions. [2022-02-15 13:31:20,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:31:20,252 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 24 [2022-02-15 13:31:20,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:20,255 INFO L225 Difference]: With dead ends: 1713 [2022-02-15 13:31:20,255 INFO L226 Difference]: Without dead ends: 1682 [2022-02-15 13:31:20,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:31:20,255 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:20,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 247 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:31:20,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2022-02-15 13:31:20,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1599. [2022-02-15 13:31:20,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1598 states have (on average 3.24342928660826) internal successors, (5183), 1598 states have internal predecessors, (5183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:20,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 5183 transitions. [2022-02-15 13:31:20,273 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 5183 transitions. Word has length 24 [2022-02-15 13:31:20,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:20,273 INFO L470 AbstractCegarLoop]: Abstraction has 1599 states and 5183 transitions. [2022-02-15 13:31:20,273 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) [2022-02-15 13:31:20,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 5183 transitions. [2022-02-15 13:31:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:20,275 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:20,276 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:20,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:20,491 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,SelfDestructingSolverStorable189 [2022-02-15 13:31:20,491 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:20,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:20,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1879571535, now seen corresponding path program 175 times [2022-02-15 13:31:20,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:20,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858754216] [2022-02-15 13:31:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:20,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:20,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:20,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858754216] [2022-02-15 13:31:20,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858754216] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:20,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451564094] [2022-02-15 13:31:20,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:31:20,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:20,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:20,635 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) [2022-02-15 13:31:20,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-02-15 13:31:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:20,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:20,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:20,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:31:20,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:31:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:20,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:21,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:21,174 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 141 treesize of output 121 [2022-02-15 13:31:21,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:21,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-15 13:31:21,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:21,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 13:31:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:21,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451564094] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:21,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:21,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:31:21,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60074656] [2022-02-15 13:31:21,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:21,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:31:21,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:21,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:31:21,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:31:21,324 INFO L87 Difference]: Start difference. First operand 1599 states and 5183 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:21,991 INFO L93 Difference]: Finished difference Result 1910 states and 6048 transitions. [2022-02-15 13:31:21,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:31:21,991 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:31:21,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:22,005 INFO L225 Difference]: With dead ends: 1910 [2022-02-15 13:31:22,005 INFO L226 Difference]: Without dead ends: 1809 [2022-02-15 13:31:22,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:31:22,006 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 93 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:22,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 310 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:31:22,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2022-02-15 13:31:22,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1601. [2022-02-15 13:31:22,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 3.24375) internal successors, (5190), 1600 states have internal predecessors, (5190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 5190 transitions. [2022-02-15 13:31:22,063 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 5190 transitions. Word has length 24 [2022-02-15 13:31:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:22,064 INFO L470 AbstractCegarLoop]: Abstraction has 1601 states and 5190 transitions. [2022-02-15 13:31:22,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 5190 transitions. [2022-02-15 13:31:22,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:22,066 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:22,066 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:22,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-02-15 13:31:22,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-02-15 13:31:22,279 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:22,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:22,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1442654375, now seen corresponding path program 176 times [2022-02-15 13:31:22,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:22,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144506448] [2022-02-15 13:31:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:22,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:31:22,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:22,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144506448] [2022-02-15 13:31:22,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144506448] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:22,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736175548] [2022-02-15 13:31:22,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:31:22,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:22,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:22,427 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) [2022-02-15 13:31:22,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-02-15 13:31:22,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:31:22,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:22,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:22,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:22,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:22,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:31:22,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:22,943 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-15 13:31:22,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:22,945 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:31:22,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:31:22,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:23,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:23,495 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 79 treesize of output 70 [2022-02-15 13:31:23,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:23,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-15 13:31:23,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:23,597 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 28 treesize of output 30 [2022-02-15 13:31:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:31:23,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736175548] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:23,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:23,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:31:23,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800724968] [2022-02-15 13:31:23,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:23,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:31:23,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:23,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:31:23,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:31:23,636 INFO L87 Difference]: Start difference. First operand 1601 states and 5190 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:23,933 INFO L93 Difference]: Finished difference Result 1689 states and 5425 transitions. [2022-02-15 13:31:23,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:31:23,933 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:31:23,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:23,936 INFO L225 Difference]: With dead ends: 1689 [2022-02-15 13:31:23,937 INFO L226 Difference]: Without dead ends: 1642 [2022-02-15 13:31:23,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:31:23,937 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:23,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 212 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 638 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2022-02-15 13:31:23,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2022-02-15 13:31:23,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1605. [2022-02-15 13:31:23,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.2462593516209477) internal successors, (5207), 1604 states have internal predecessors, (5207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:23,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5207 transitions. [2022-02-15 13:31:23,954 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5207 transitions. Word has length 24 [2022-02-15 13:31:23,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:23,954 INFO L470 AbstractCegarLoop]: Abstraction has 1605 states and 5207 transitions. [2022-02-15 13:31:23,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:23,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5207 transitions. [2022-02-15 13:31:23,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:23,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:23,956 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:23,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:24,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:24,172 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:24,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:24,172 INFO L85 PathProgramCache]: Analyzing trace with hash -520952235, now seen corresponding path program 177 times [2022-02-15 13:31:24,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:24,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189416481] [2022-02-15 13:31:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:24,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:24,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:24,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189416481] [2022-02-15 13:31:24,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189416481] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:24,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223461759] [2022-02-15 13:31:24,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:31:24,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:24,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:24,314 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) [2022-02-15 13:31:24,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-02-15 13:31:24,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:31:24,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:24,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:24,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:24,372 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 41 treesize of output 35 [2022-02-15 13:31:24,438 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 21 treesize of output 17 [2022-02-15 13:31:24,439 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 12 treesize of output 8 [2022-02-15 13:31:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:24,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:24,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:24,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-02-15 13:31:24,856 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:24,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-15 13:31:24,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:24,859 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 28 treesize of output 30 [2022-02-15 13:31:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:24,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223461759] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:24,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:24,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:31:24,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052356634] [2022-02-15 13:31:24,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:24,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:31:24,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:24,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:31:24,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:31:24,891 INFO L87 Difference]: Start difference. First operand 1605 states and 5207 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:25,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:25,281 INFO L93 Difference]: Finished difference Result 1814 states and 5790 transitions. [2022-02-15 13:31:25,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:31:25,281 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:31:25,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:25,284 INFO L225 Difference]: With dead ends: 1814 [2022-02-15 13:31:25,284 INFO L226 Difference]: Without dead ends: 1807 [2022-02-15 13:31:25,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:31:25,284 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 85 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:25,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 227 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 668 Invalid, 0 Unknown, 8 Unchecked, 0.2s Time] [2022-02-15 13:31:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2022-02-15 13:31:25,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1614. [2022-02-15 13:31:25,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1613 states have (on average 3.2467451952882826) internal successors, (5237), 1613 states have internal predecessors, (5237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:25,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 5237 transitions. [2022-02-15 13:31:25,303 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 5237 transitions. Word has length 24 [2022-02-15 13:31:25,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:25,303 INFO L470 AbstractCegarLoop]: Abstraction has 1614 states and 5237 transitions. [2022-02-15 13:31:25,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:25,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 5237 transitions. [2022-02-15 13:31:25,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:25,305 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:25,305 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:25,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:25,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:25,521 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:25,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:25,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2100269805, now seen corresponding path program 178 times [2022-02-15 13:31:25,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:25,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612555114] [2022-02-15 13:31:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:25,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:25,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:25,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612555114] [2022-02-15 13:31:25,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612555114] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:25,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890758283] [2022-02-15 13:31:25,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:31:25,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:25,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:25,628 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) [2022-02-15 13:31:25,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-02-15 13:31:25,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:31:25,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:25,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:31:25,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:25,709 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 41 treesize of output 35 [2022-02-15 13:31:25,817 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 30 treesize of output 24 [2022-02-15 13:31:25,875 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:25,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:26,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:26,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 101 [2022-02-15 13:31:26,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:26,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-02-15 13:31:26,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:26,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-02-15 13:31:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:26,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890758283] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:26,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:26,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:31:26,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125158286] [2022-02-15 13:31:26,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:26,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:31:26,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:26,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:31:26,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:31:26,408 INFO L87 Difference]: Start difference. First operand 1614 states and 5237 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2022-02-15 13:31:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:26,886 INFO L93 Difference]: Finished difference Result 1891 states and 5990 transitions. [2022-02-15 13:31:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:31:26,886 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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 24 [2022-02-15 13:31:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:26,890 INFO L225 Difference]: With dead ends: 1891 [2022-02-15 13:31:26,890 INFO L226 Difference]: Without dead ends: 1781 [2022-02-15 13:31:26,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:31:26,891 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 97 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:26,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 284 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:31:26,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2022-02-15 13:31:26,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1611. [2022-02-15 13:31:26,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.242857142857143) internal successors, (5221), 1610 states have internal predecessors, (5221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5221 transitions. [2022-02-15 13:31:26,912 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5221 transitions. Word has length 24 [2022-02-15 13:31:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:26,912 INFO L470 AbstractCegarLoop]: Abstraction has 1611 states and 5221 transitions. [2022-02-15 13:31:26,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 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) [2022-02-15 13:31:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5221 transitions. [2022-02-15 13:31:26,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:26,914 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:26,914 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:26,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-02-15 13:31:27,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:27,130 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:27,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:27,130 INFO L85 PathProgramCache]: Analyzing trace with hash 804957977, now seen corresponding path program 179 times [2022-02-15 13:31:27,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:27,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396173990] [2022-02-15 13:31:27,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:27,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:27,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:27,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396173990] [2022-02-15 13:31:27,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396173990] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:27,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451595392] [2022-02-15 13:31:27,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:31:27,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:27,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:27,299 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) [2022-02-15 13:31:27,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-02-15 13:31:27,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:31:27,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:27,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:27,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:27,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:27,394 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:31:27,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:27,660 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:31:27,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:27,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 treesize of output 7 [2022-02-15 13:31:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:27,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:28,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:28,180 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 141 treesize of output 121 [2022-02-15 13:31:28,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:28,280 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 36 treesize of output 38 [2022-02-15 13:31:28,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:28,283 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 30 treesize of output 32 [2022-02-15 13:31:28,311 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:28,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451595392] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:28,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:28,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:31:28,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084441277] [2022-02-15 13:31:28,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:28,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:31:28,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:28,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:31:28,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:31:28,312 INFO L87 Difference]: Start difference. First operand 1611 states and 5221 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:28,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:28,449 INFO L93 Difference]: Finished difference Result 1682 states and 5429 transitions. [2022-02-15 13:31:28,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:31:28,449 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:31:28,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:28,452 INFO L225 Difference]: With dead ends: 1682 [2022-02-15 13:31:28,452 INFO L226 Difference]: Without dead ends: 1651 [2022-02-15 13:31:28,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:31:28,453 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:28,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 161 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 403 Invalid, 0 Unknown, 124 Unchecked, 0.1s Time] [2022-02-15 13:31:28,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2022-02-15 13:31:28,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1604. [2022-02-15 13:31:28,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 3.243917654398004) internal successors, (5200), 1603 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 5200 transitions. [2022-02-15 13:31:28,470 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 5200 transitions. Word has length 24 [2022-02-15 13:31:28,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:28,470 INFO L470 AbstractCegarLoop]: Abstraction has 1604 states and 5200 transitions. [2022-02-15 13:31:28,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 5200 transitions. [2022-02-15 13:31:28,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:28,472 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:28,472 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:28,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:28,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-02-15 13:31:28,683 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:28,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:28,684 INFO L85 PathProgramCache]: Analyzing trace with hash -2131722677, now seen corresponding path program 180 times [2022-02-15 13:31:28,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:28,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966623059] [2022-02-15 13:31:28,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:28,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:28,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:28,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966623059] [2022-02-15 13:31:28,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966623059] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:28,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153843937] [2022-02-15 13:31:28,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:31:28,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:28,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:28,851 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) [2022-02-15 13:31:28,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-02-15 13:31:28,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:31:28,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:28,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:31:28,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:28,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:31:29,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:29,053 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:31:29,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:29,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:31:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:29,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:29,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:29,676 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 110 treesize of output 98 [2022-02-15 13:31:29,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:29,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-02-15 13:31:29,769 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:29,769 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 38 treesize of output 38 [2022-02-15 13:31:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:29,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153843937] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:29,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:29,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:31:29,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001634579] [2022-02-15 13:31:29,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:29,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:31:29,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:29,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:31:29,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:31:29,798 INFO L87 Difference]: Start difference. First operand 1604 states and 5200 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) [2022-02-15 13:31:31,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:31,098 INFO L93 Difference]: Finished difference Result 2207 states and 6812 transitions. [2022-02-15 13:31:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 13:31:31,098 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 24 [2022-02-15 13:31:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:31,102 INFO L225 Difference]: With dead ends: 2207 [2022-02-15 13:31:31,102 INFO L226 Difference]: Without dead ends: 1991 [2022-02-15 13:31:31,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:31:31,102 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 170 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:31,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 434 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1207 Invalid, 0 Unknown, 85 Unchecked, 0.4s Time] [2022-02-15 13:31:31,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2022-02-15 13:31:31,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1605. [2022-02-15 13:31:31,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.2450124688279303) internal successors, (5205), 1604 states have internal predecessors, (5205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5205 transitions. [2022-02-15 13:31:31,122 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5205 transitions. Word has length 24 [2022-02-15 13:31:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:31,122 INFO L470 AbstractCegarLoop]: Abstraction has 1605 states and 5205 transitions. [2022-02-15 13:31:31,123 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) [2022-02-15 13:31:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5205 transitions. [2022-02-15 13:31:31,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:31,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:31,125 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:31,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:31,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:31,340 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:31,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:31,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1210232295, now seen corresponding path program 181 times [2022-02-15 13:31:31,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:31,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969710398] [2022-02-15 13:31:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:31,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:31,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:31,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969710398] [2022-02-15 13:31:31,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969710398] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:31,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19023211] [2022-02-15 13:31:31,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:31:31,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:31,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:31,549 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) [2022-02-15 13:31:31,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-02-15 13:31:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:31,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:31:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:31,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:31:31,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:31,735 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:31:31,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:31,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:31:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:31,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:32,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:32,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-15 13:31:32,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:32,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-02-15 13:31:32,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:32,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 44 [2022-02-15 13:31:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:32,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19023211] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:32,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:32,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:31:32,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921401914] [2022-02-15 13:31:32,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:32,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:31:32,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:32,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:31:32,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:31:32,349 INFO L87 Difference]: Start difference. First operand 1605 states and 5205 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) [2022-02-15 13:31:32,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:32,689 INFO L93 Difference]: Finished difference Result 1830 states and 5806 transitions. [2022-02-15 13:31:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:31:32,689 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 24 [2022-02-15 13:31:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:32,692 INFO L225 Difference]: With dead ends: 1830 [2022-02-15 13:31:32,692 INFO L226 Difference]: Without dead ends: 1719 [2022-02-15 13:31:32,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:31:32,692 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 94 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:32,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 194 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 542 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-02-15 13:31:32,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-02-15 13:31:32,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1618. [2022-02-15 13:31:32,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 1617 states have (on average 3.243661100803958) internal successors, (5245), 1617 states have internal predecessors, (5245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:32,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 5245 transitions. [2022-02-15 13:31:32,711 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 5245 transitions. Word has length 24 [2022-02-15 13:31:32,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:32,711 INFO L470 AbstractCegarLoop]: Abstraction has 1618 states and 5245 transitions. [2022-02-15 13:31:32,711 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) [2022-02-15 13:31:32,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 5245 transitions. [2022-02-15 13:31:32,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:32,713 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:32,713 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:32,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:32,927 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,SelfDestructingSolverStorable196 [2022-02-15 13:31:32,927 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:32,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:32,927 INFO L85 PathProgramCache]: Analyzing trace with hash 916800473, now seen corresponding path program 182 times [2022-02-15 13:31:32,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:32,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254513062] [2022-02-15 13:31:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:32,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:31:33,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:33,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254513062] [2022-02-15 13:31:33,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254513062] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:33,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972640210] [2022-02-15 13:31:33,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:31:33,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:33,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:33,019 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) [2022-02-15 13:31:33,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-02-15 13:31:33,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:31:33,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:33,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:33,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:33,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-02-15 13:31:33,126 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 23 treesize of output 19 [2022-02-15 13:31:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:31:33,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:33,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:33,379 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 79 treesize of output 70 [2022-02-15 13:31:33,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:33,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-15 13:31:33,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:33,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 13:31:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:31:33,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972640210] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:33,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:33,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:31:33,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596466093] [2022-02-15 13:31:33,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:33,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:31:33,519 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:33,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:31:33,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:31:33,519 INFO L87 Difference]: Start difference. First operand 1618 states and 5245 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:33,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:33,769 INFO L93 Difference]: Finished difference Result 1686 states and 5408 transitions. [2022-02-15 13:31:33,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:31:33,769 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:31:33,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:33,773 INFO L225 Difference]: With dead ends: 1686 [2022-02-15 13:31:33,773 INFO L226 Difference]: Without dead ends: 1667 [2022-02-15 13:31:33,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:31:33,773 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 44 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:33,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 185 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:31:33,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2022-02-15 13:31:33,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1616. [2022-02-15 13:31:33,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1615 states have (on average 3.243343653250774) internal successors, (5238), 1615 states have internal predecessors, (5238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 5238 transitions. [2022-02-15 13:31:33,792 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 5238 transitions. Word has length 24 [2022-02-15 13:31:33,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:33,792 INFO L470 AbstractCegarLoop]: Abstraction has 1616 states and 5238 transitions. [2022-02-15 13:31:33,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:33,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 5238 transitions. [2022-02-15 13:31:33,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:33,794 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:33,794 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:33,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:34,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:34,010 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:34,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:34,010 INFO L85 PathProgramCache]: Analyzing trace with hash -415402801, now seen corresponding path program 183 times [2022-02-15 13:31:34,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:34,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910190213] [2022-02-15 13:31:34,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:34,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:34,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:34,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910190213] [2022-02-15 13:31:34,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910190213] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:34,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509081135] [2022-02-15 13:31:34,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:31:34,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:34,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:34,171 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) [2022-02-15 13:31:34,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-02-15 13:31:34,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:31:34,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:34,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:34,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:34,290 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 19 treesize of output 15 [2022-02-15 13:31:34,313 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 23 treesize of output 19 [2022-02-15 13:31:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:34,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:34,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:34,721 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 73 treesize of output 66 [2022-02-15 13:31:34,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:34,852 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 34 treesize of output 36 [2022-02-15 13:31:34,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:34,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 13:31:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:34,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509081135] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:34,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:34,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:31:34,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438190033] [2022-02-15 13:31:34,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:34,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:31:34,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:34,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:31:34,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:31:34,895 INFO L87 Difference]: Start difference. First operand 1616 states and 5238 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) [2022-02-15 13:31:35,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:35,245 INFO L93 Difference]: Finished difference Result 1761 states and 5687 transitions. [2022-02-15 13:31:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:31:35,245 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 24 [2022-02-15 13:31:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:35,266 INFO L225 Difference]: With dead ends: 1761 [2022-02-15 13:31:35,266 INFO L226 Difference]: Without dead ends: 1715 [2022-02-15 13:31:35,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:31:35,266 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 84 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:35,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 172 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:31:35,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-02-15 13:31:35,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1616. [2022-02-15 13:31:35,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1615 states have (on average 3.243343653250774) internal successors, (5238), 1615 states have internal predecessors, (5238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 5238 transitions. [2022-02-15 13:31:35,290 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 5238 transitions. Word has length 24 [2022-02-15 13:31:35,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:35,290 INFO L470 AbstractCegarLoop]: Abstraction has 1616 states and 5238 transitions. [2022-02-15 13:31:35,290 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) [2022-02-15 13:31:35,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 5238 transitions. [2022-02-15 13:31:35,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:35,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:35,292 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:35,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:35,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:35,508 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:35,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:35,508 INFO L85 PathProgramCache]: Analyzing trace with hash -997163581, now seen corresponding path program 184 times [2022-02-15 13:31:35,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:35,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467186834] [2022-02-15 13:31:35,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:35,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:35,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:35,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:35,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467186834] [2022-02-15 13:31:35,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467186834] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:35,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362829119] [2022-02-15 13:31:35,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:31:35,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:35,699 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) [2022-02-15 13:31:35,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-02-15 13:31:35,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:31:35,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:35,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:31:35,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:35,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:35,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:31:35,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:35,888 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:31:35,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:35,891 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:31:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:36,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:36,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:36,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-02-15 13:31:36,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:36,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-02-15 13:31:36,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:36,849 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 38 treesize of output 38 [2022-02-15 13:31:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:36,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362829119] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:36,905 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:36,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:31:36,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781435845] [2022-02-15 13:31:36,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:36,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:31:36,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:36,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:31:36,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:31:36,906 INFO L87 Difference]: Start difference. First operand 1616 states and 5238 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) [2022-02-15 13:31:38,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:38,652 INFO L93 Difference]: Finished difference Result 2252 states and 6840 transitions. [2022-02-15 13:31:38,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:31:38,652 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 24 [2022-02-15 13:31:38,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:38,656 INFO L225 Difference]: With dead ends: 2252 [2022-02-15 13:31:38,657 INFO L226 Difference]: Without dead ends: 2048 [2022-02-15 13:31:38,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:31:38,657 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 247 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:38,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 373 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 973 Invalid, 0 Unknown, 174 Unchecked, 0.5s Time] [2022-02-15 13:31:38,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2022-02-15 13:31:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1617. [2022-02-15 13:31:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 3.243811881188119) internal successors, (5242), 1616 states have internal predecessors, (5242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:38,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 5242 transitions. [2022-02-15 13:31:38,679 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 5242 transitions. Word has length 24 [2022-02-15 13:31:38,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:38,679 INFO L470 AbstractCegarLoop]: Abstraction has 1617 states and 5242 transitions. [2022-02-15 13:31:38,679 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) [2022-02-15 13:31:38,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 5242 transitions. [2022-02-15 13:31:38,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:38,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:38,681 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:38,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:38,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-02-15 13:31:38,897 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:38,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1112684295, now seen corresponding path program 185 times [2022-02-15 13:31:38,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:38,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281025312] [2022-02-15 13:31:38,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:38,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:39,099 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:39,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281025312] [2022-02-15 13:31:39,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281025312] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:39,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919034489] [2022-02-15 13:31:39,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:31:39,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:39,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:39,100 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) [2022-02-15 13:31:39,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-02-15 13:31:39,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:31:39,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:39,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:39,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:39,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:39,213 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:31:39,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:39,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:31:39,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:39,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 treesize of output 7 [2022-02-15 13:31:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:39,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:39,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:39,967 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 73 treesize of output 66 [2022-02-15 13:31:40,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:40,066 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 34 treesize of output 36 [2022-02-15 13:31:40,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:40,070 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 28 treesize of output 30 [2022-02-15 13:31:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:40,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919034489] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:40,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:40,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:31:40,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456129084] [2022-02-15 13:31:40,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:40,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:31:40,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:40,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:31:40,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:31:40,122 INFO L87 Difference]: Start difference. First operand 1617 states and 5242 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) [2022-02-15 13:31:40,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:40,496 INFO L93 Difference]: Finished difference Result 1717 states and 5550 transitions. [2022-02-15 13:31:40,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:31:40,496 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 24 [2022-02-15 13:31:40,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:40,499 INFO L225 Difference]: With dead ends: 1717 [2022-02-15 13:31:40,499 INFO L226 Difference]: Without dead ends: 1671 [2022-02-15 13:31:40,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:31:40,500 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:40,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 153 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 514 Invalid, 0 Unknown, 206 Unchecked, 0.2s Time] [2022-02-15 13:31:40,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2022-02-15 13:31:40,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1624. [2022-02-15 13:31:40,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 3.2470733210104745) internal successors, (5270), 1623 states have internal predecessors, (5270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:40,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 5270 transitions. [2022-02-15 13:31:40,518 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 5270 transitions. Word has length 24 [2022-02-15 13:31:40,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:40,518 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 5270 transitions. [2022-02-15 13:31:40,518 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) [2022-02-15 13:31:40,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 5270 transitions. [2022-02-15 13:31:40,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:40,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:40,520 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:40,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:40,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-02-15 13:31:40,737 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:40,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:40,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1633718827, now seen corresponding path program 186 times [2022-02-15 13:31:40,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:40,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132426865] [2022-02-15 13:31:40,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:40,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:40,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:40,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:40,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132426865] [2022-02-15 13:31:40,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132426865] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:40,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522949414] [2022-02-15 13:31:40,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:31:40,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:40,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:40,899 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) [2022-02-15 13:31:40,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-02-15 13:31:40,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:31:40,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:40,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:40,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:41,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:41,010 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:31:41,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:41,214 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:31:41,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:41,228 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-15 13:31:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:41,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:41,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:41,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:31:41,992 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:41,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-15 13:31:41,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:41,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-02-15 13:31:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:42,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522949414] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:42,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:42,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:31:42,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012539164] [2022-02-15 13:31:42,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:42,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:31:42,041 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:42,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:31:42,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:31:42,041 INFO L87 Difference]: Start difference. First operand 1624 states and 5270 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:42,243 INFO L93 Difference]: Finished difference Result 1749 states and 5590 transitions. [2022-02-15 13:31:42,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:31:42,243 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:31:42,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:42,247 INFO L225 Difference]: With dead ends: 1749 [2022-02-15 13:31:42,247 INFO L226 Difference]: Without dead ends: 1691 [2022-02-15 13:31:42,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:31:42,247 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:42,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 199 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 474 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2022-02-15 13:31:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2022-02-15 13:31:42,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1652. [2022-02-15 13:31:42,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 3.2356147789218657) internal successors, (5342), 1651 states have internal predecessors, (5342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:42,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 5342 transitions. [2022-02-15 13:31:42,267 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 5342 transitions. Word has length 24 [2022-02-15 13:31:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:42,267 INFO L470 AbstractCegarLoop]: Abstraction has 1652 states and 5342 transitions. [2022-02-15 13:31:42,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 5342 transitions. [2022-02-15 13:31:42,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:42,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:42,269 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:42,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:42,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:42,485 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:42,485 INFO L85 PathProgramCache]: Analyzing trace with hash 89353387, now seen corresponding path program 187 times [2022-02-15 13:31:42,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:42,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541612422] [2022-02-15 13:31:42,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:42,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:42,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:42,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541612422] [2022-02-15 13:31:42,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541612422] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:42,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543898941] [2022-02-15 13:31:42,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:31:42,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:42,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:42,682 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) [2022-02-15 13:31:42,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-02-15 13:31:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:42,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:42,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:42,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:42,800 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:31:42,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:42,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 23 [2022-02-15 13:31:42,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:42,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 12 [2022-02-15 13:31:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:43,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:43,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:43,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:31:43,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:43,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-15 13:31:43,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:43,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 13:31:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:43,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543898941] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:43,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:43,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:31:43,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859242118] [2022-02-15 13:31:43,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:43,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:31:43,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:43,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:31:43,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:31:43,667 INFO L87 Difference]: Start difference. First operand 1652 states and 5342 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:43,798 INFO L93 Difference]: Finished difference Result 1776 states and 5659 transitions. [2022-02-15 13:31:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:31:43,798 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:31:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:43,800 INFO L225 Difference]: With dead ends: 1776 [2022-02-15 13:31:43,801 INFO L226 Difference]: Without dead ends: 1726 [2022-02-15 13:31:43,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:31:43,801 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:43,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 217 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 373 Invalid, 0 Unknown, 136 Unchecked, 0.1s Time] [2022-02-15 13:31:43,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2022-02-15 13:31:43,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1617. [2022-02-15 13:31:43,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 3.243811881188119) internal successors, (5242), 1616 states have internal predecessors, (5242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:43,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 5242 transitions. [2022-02-15 13:31:43,820 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 5242 transitions. Word has length 24 [2022-02-15 13:31:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:43,820 INFO L470 AbstractCegarLoop]: Abstraction has 1617 states and 5242 transitions. [2022-02-15 13:31:43,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:43,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 5242 transitions. [2022-02-15 13:31:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:43,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:43,822 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:43,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-02-15 13:31:44,035 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,SelfDestructingSolverStorable202 [2022-02-15 13:31:44,035 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:44,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:44,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1149316057, now seen corresponding path program 188 times [2022-02-15 13:31:44,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:44,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58918923] [2022-02-15 13:31:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:44,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:44,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:44,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58918923] [2022-02-15 13:31:44,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58918923] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:44,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782473602] [2022-02-15 13:31:44,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:31:44,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:44,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:44,206 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) [2022-02-15 13:31:44,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-02-15 13:31:44,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:31:44,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:44,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:44,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:44,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:44,329 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:31:44,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:44,436 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:31:44,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:44,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:31:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:44,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:44,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:44,890 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 141 treesize of output 121 [2022-02-15 13:31:44,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:44,986 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 34 treesize of output 36 [2022-02-15 13:31:44,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:44,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 13:31:45,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:45,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782473602] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:45,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:45,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:31:45,019 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444754525] [2022-02-15 13:31:45,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:45,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:31:45,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:45,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:31:45,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:31:45,020 INFO L87 Difference]: Start difference. First operand 1617 states and 5242 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:45,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:45,246 INFO L93 Difference]: Finished difference Result 1711 states and 5494 transitions. [2022-02-15 13:31:45,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:31:45,246 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:31:45,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:45,249 INFO L225 Difference]: With dead ends: 1711 [2022-02-15 13:31:45,249 INFO L226 Difference]: Without dead ends: 1676 [2022-02-15 13:31:45,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:31:45,249 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:45,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 262 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 485 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2022-02-15 13:31:45,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2022-02-15 13:31:45,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1617. [2022-02-15 13:31:45,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 3.243811881188119) internal successors, (5242), 1616 states have internal predecessors, (5242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:45,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 5242 transitions. [2022-02-15 13:31:45,266 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 5242 transitions. Word has length 24 [2022-02-15 13:31:45,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:45,267 INFO L470 AbstractCegarLoop]: Abstraction has 1617 states and 5242 transitions. [2022-02-15 13:31:45,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:45,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 5242 transitions. [2022-02-15 13:31:45,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:45,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:45,269 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:45,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:45,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:45,483 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:45,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:45,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1838326243, now seen corresponding path program 189 times [2022-02-15 13:31:45,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:45,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618867048] [2022-02-15 13:31:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:45,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:45,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:45,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618867048] [2022-02-15 13:31:45,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618867048] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:45,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122691373] [2022-02-15 13:31:45,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:31:45,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:45,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:45,608 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) [2022-02-15 13:31:45,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-02-15 13:31:45,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:31:45,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:45,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:45,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:45,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:45,696 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:31:45,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:45,790 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:31:45,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:45,792 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:31:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:45,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:46,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:46,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:31:46,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:46,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-15 13:31:46,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:46,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-02-15 13:31:46,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:46,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122691373] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:46,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:46,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:31:46,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511895437] [2022-02-15 13:31:46,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:46,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:31:46,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:46,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:31:46,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:31:46,288 INFO L87 Difference]: Start difference. First operand 1617 states and 5242 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:46,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:46,589 INFO L93 Difference]: Finished difference Result 1752 states and 5596 transitions. [2022-02-15 13:31:46,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:31:46,589 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:31:46,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:46,592 INFO L225 Difference]: With dead ends: 1752 [2022-02-15 13:31:46,592 INFO L226 Difference]: Without dead ends: 1694 [2022-02-15 13:31:46,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:31:46,592 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:46,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 245 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 720 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-02-15 13:31:46,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2022-02-15 13:31:46,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1617. [2022-02-15 13:31:46,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1617 states, 1616 states have (on average 3.243811881188119) internal successors, (5242), 1616 states have internal predecessors, (5242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:46,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1617 states to 1617 states and 5242 transitions. [2022-02-15 13:31:46,610 INFO L78 Accepts]: Start accepts. Automaton has 1617 states and 5242 transitions. Word has length 24 [2022-02-15 13:31:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:46,611 INFO L470 AbstractCegarLoop]: Abstraction has 1617 states and 5242 transitions. [2022-02-15 13:31:46,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:46,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1617 states and 5242 transitions. [2022-02-15 13:31:46,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:46,613 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:46,613 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:46,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:46,832 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,SelfDestructingSolverStorable204 [2022-02-15 13:31:46,832 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:46,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:46,832 INFO L85 PathProgramCache]: Analyzing trace with hash -577997105, now seen corresponding path program 190 times [2022-02-15 13:31:46,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:46,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518938197] [2022-02-15 13:31:46,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:46,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:46,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:46,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:46,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518938197] [2022-02-15 13:31:46,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518938197] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:46,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64580382] [2022-02-15 13:31:46,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:31:46,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:46,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:46,988 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) [2022-02-15 13:31:46,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-02-15 13:31:47,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:31:47,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:47,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:31:47,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:47,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:47,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:31:47,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:47,228 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-15 13:31:47,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:47,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2022-02-15 13:31:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:47,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:47,775 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:47,775 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 133 treesize of output 123 [2022-02-15 13:31:47,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:47,939 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 112 treesize of output 98 [2022-02-15 13:31:47,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:47,943 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 90 treesize of output 76 [2022-02-15 13:31:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:47,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64580382] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:47,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:47,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:31:47,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218310885] [2022-02-15 13:31:47,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:47,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:31:47,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:47,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:31:47,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:31:47,997 INFO L87 Difference]: Start difference. First operand 1617 states and 5242 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) [2022-02-15 13:31:48,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:48,571 INFO L93 Difference]: Finished difference Result 1861 states and 5851 transitions. [2022-02-15 13:31:48,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:31:48,572 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 24 [2022-02-15 13:31:48,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:48,575 INFO L225 Difference]: With dead ends: 1861 [2022-02-15 13:31:48,575 INFO L226 Difference]: Without dead ends: 1777 [2022-02-15 13:31:48,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:31:48,575 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 119 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:48,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 257 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 680 Invalid, 0 Unknown, 215 Unchecked, 0.2s Time] [2022-02-15 13:31:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2022-02-15 13:31:48,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1631. [2022-02-15 13:31:48,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1630 states have (on average 3.2447852760736198) internal successors, (5289), 1630 states have internal predecessors, (5289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:48,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 5289 transitions. [2022-02-15 13:31:48,593 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 5289 transitions. Word has length 24 [2022-02-15 13:31:48,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:48,593 INFO L470 AbstractCegarLoop]: Abstraction has 1631 states and 5289 transitions. [2022-02-15 13:31:48,593 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) [2022-02-15 13:31:48,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 5289 transitions. [2022-02-15 13:31:48,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:48,595 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:48,595 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:48,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:48,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:48,811 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:48,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:48,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1742439369, now seen corresponding path program 191 times [2022-02-15 13:31:48,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:48,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524526286] [2022-02-15 13:31:48,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:48,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:48,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:48,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524526286] [2022-02-15 13:31:48,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524526286] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:48,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515408568] [2022-02-15 13:31:48,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:31:48,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:48,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:48,964 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) [2022-02-15 13:31:48,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-02-15 13:31:48,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:31:48,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:48,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:48,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:49,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:49,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:31:49,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:49,137 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-15 13:31:49,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:49,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 48 treesize of output 28 [2022-02-15 13:31:49,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:49,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:49,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:49,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 120 [2022-02-15 13:31:49,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:49,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 70 [2022-02-15 13:31:49,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:49,660 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 61 treesize of output 54 [2022-02-15 13:31:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:49,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515408568] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:49,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:49,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:31:49,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693738636] [2022-02-15 13:31:49,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:49,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:31:49,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:49,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:31:49,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:31:49,742 INFO L87 Difference]: Start difference. First operand 1631 states and 5289 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:50,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:50,278 INFO L93 Difference]: Finished difference Result 1710 states and 5520 transitions. [2022-02-15 13:31:50,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:31:50,278 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:31:50,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:50,281 INFO L225 Difference]: With dead ends: 1710 [2022-02-15 13:31:50,281 INFO L226 Difference]: Without dead ends: 1675 [2022-02-15 13:31:50,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:31:50,281 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:50,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 272 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 714 Invalid, 0 Unknown, 163 Unchecked, 0.2s Time] [2022-02-15 13:31:50,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2022-02-15 13:31:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1629. [2022-02-15 13:31:50,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.2457002457002457) internal successors, (5284), 1628 states have internal predecessors, (5284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5284 transitions. [2022-02-15 13:31:50,298 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5284 transitions. Word has length 24 [2022-02-15 13:31:50,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:50,298 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 5284 transitions. [2022-02-15 13:31:50,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5284 transitions. [2022-02-15 13:31:50,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:50,300 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:50,301 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:50,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:50,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:50,508 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:50,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:50,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1703905455, now seen corresponding path program 192 times [2022-02-15 13:31:50,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:50,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596667827] [2022-02-15 13:31:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:50,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:50,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:50,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596667827] [2022-02-15 13:31:50,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596667827] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:50,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375763227] [2022-02-15 13:31:50,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:31:50,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:50,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:50,683 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) [2022-02-15 13:31:50,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-02-15 13:31:50,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:31:50,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:50,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:50,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:50,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:50,808 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:31:51,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:51,002 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-15 13:31:51,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:51,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 53 treesize of output 33 [2022-02-15 13:31:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:51,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:51,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:51,689 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 102 treesize of output 96 [2022-02-15 13:31:51,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:51,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 130 [2022-02-15 13:31:51,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:51,970 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 122 treesize of output 102 [2022-02-15 13:31:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:52,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375763227] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:52,079 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:52,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:31:52,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249223103] [2022-02-15 13:31:52,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:52,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:31:52,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:52,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:31:52,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:31:52,080 INFO L87 Difference]: Start difference. First operand 1629 states and 5284 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:52,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:52,408 INFO L93 Difference]: Finished difference Result 1718 states and 5540 transitions. [2022-02-15 13:31:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:31:52,408 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:31:52,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:52,411 INFO L225 Difference]: With dead ends: 1718 [2022-02-15 13:31:52,411 INFO L226 Difference]: Without dead ends: 1679 [2022-02-15 13:31:52,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:31:52,412 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:52,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 278 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 754 Invalid, 0 Unknown, 272 Unchecked, 0.3s Time] [2022-02-15 13:31:52,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2022-02-15 13:31:52,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1629. [2022-02-15 13:31:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.2444717444717446) internal successors, (5282), 1628 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:52,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5282 transitions. [2022-02-15 13:31:52,444 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5282 transitions. Word has length 24 [2022-02-15 13:31:52,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:52,444 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 5282 transitions. [2022-02-15 13:31:52,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5282 transitions. [2022-02-15 13:31:52,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:52,446 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:52,447 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:52,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-02-15 13:31:52,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:52,663 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:52,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:52,664 INFO L85 PathProgramCache]: Analyzing trace with hash -269446261, now seen corresponding path program 193 times [2022-02-15 13:31:52,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:52,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001650289] [2022-02-15 13:31:52,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:52,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:52,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:52,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:52,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001650289] [2022-02-15 13:31:52,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001650289] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:52,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142635989] [2022-02-15 13:31:52,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:31:52,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:52,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:52,844 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) [2022-02-15 13:31:52,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-02-15 13:31:52,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:52,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:31:52,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:52,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:52,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:31:53,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:53,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 13:31:53,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:53,043 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:31:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:53,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:53,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:53,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 123 [2022-02-15 13:31:54,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:54,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-15 13:31:54,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:54,187 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 97 treesize of output 83 [2022-02-15 13:31:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:54,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142635989] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:54,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:54,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:31:54,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643096761] [2022-02-15 13:31:54,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:54,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:31:54,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:54,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:31:54,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:31:54,287 INFO L87 Difference]: Start difference. First operand 1629 states and 5282 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) [2022-02-15 13:31:55,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:55,936 INFO L93 Difference]: Finished difference Result 2184 states and 6706 transitions. [2022-02-15 13:31:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 13:31:55,936 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 24 [2022-02-15 13:31:55,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:55,940 INFO L225 Difference]: With dead ends: 2184 [2022-02-15 13:31:55,941 INFO L226 Difference]: Without dead ends: 2011 [2022-02-15 13:31:55,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=306, Invalid=1416, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 13:31:55,941 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 247 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:55,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 222 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 705 Invalid, 0 Unknown, 5 Unchecked, 0.4s Time] [2022-02-15 13:31:55,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2022-02-15 13:31:55,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1628. [2022-02-15 13:31:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1627 states have (on average 3.246465888137677) internal successors, (5282), 1627 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:55,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 5282 transitions. [2022-02-15 13:31:55,967 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 5282 transitions. Word has length 24 [2022-02-15 13:31:55,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:55,967 INFO L470 AbstractCegarLoop]: Abstraction has 1628 states and 5282 transitions. [2022-02-15 13:31:55,968 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) [2022-02-15 13:31:55,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 5282 transitions. [2022-02-15 13:31:55,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:55,969 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:55,970 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:55,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-02-15 13:31:56,171 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,SelfDestructingSolverStorable208 [2022-02-15 13:31:56,171 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:56,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:56,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1992554091, now seen corresponding path program 194 times [2022-02-15 13:31:56,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:56,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102450447] [2022-02-15 13:31:56,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:56,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:56,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:56,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102450447] [2022-02-15 13:31:56,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102450447] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:56,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157697315] [2022-02-15 13:31:56,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:31:56,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:56,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:56,414 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) [2022-02-15 13:31:56,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-02-15 13:31:56,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:31:56,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:56,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:56,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:56,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:56,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:31:56,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:56,684 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-02-15 13:31:56,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:56,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-02-15 13:31:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:56,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:57,245 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:57,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-02-15 13:31:57,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:57,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 130 [2022-02-15 13:31:57,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:57,480 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 122 treesize of output 102 [2022-02-15 13:31:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:57,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157697315] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:57,596 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:57,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:31:57,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722262235] [2022-02-15 13:31:57,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:57,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:31:57,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:57,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:31:57,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:31:57,597 INFO L87 Difference]: Start difference. First operand 1628 states and 5282 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:57,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:57,929 INFO L93 Difference]: Finished difference Result 1718 states and 5521 transitions. [2022-02-15 13:31:57,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:31:57,929 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:31:57,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:57,931 INFO L225 Difference]: With dead ends: 1718 [2022-02-15 13:31:57,932 INFO L226 Difference]: Without dead ends: 1679 [2022-02-15 13:31:57,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:31:57,932 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:57,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 248 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 456 Invalid, 0 Unknown, 211 Unchecked, 0.2s Time] [2022-02-15 13:31:57,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2022-02-15 13:31:57,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1630. [2022-02-15 13:31:57,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.245549416820135) internal successors, (5287), 1629 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5287 transitions. [2022-02-15 13:31:57,949 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5287 transitions. Word has length 24 [2022-02-15 13:31:57,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:57,949 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 5287 transitions. [2022-02-15 13:31:57,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:57,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5287 transitions. [2022-02-15 13:31:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:57,951 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:57,951 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:57,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-02-15 13:31:58,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-02-15 13:31:58,167 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:31:58,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:31:58,168 INFO L85 PathProgramCache]: Analyzing trace with hash 894128687, now seen corresponding path program 195 times [2022-02-15 13:31:58,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:31:58,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496871815] [2022-02-15 13:31:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:31:58,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:31:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:31:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:58,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:31:58,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496871815] [2022-02-15 13:31:58,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496871815] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:31:58,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207600703] [2022-02-15 13:31:58,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:31:58,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:31:58,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:31:58,367 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) [2022-02-15 13:31:58,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-02-15 13:31:58,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:31:58,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:31:58,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:31:58,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:31:58,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:58,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:31:58,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:58,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-15 13:31:58,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:31:58,547 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-02-15 13:31:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:58,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:31:59,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:59,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-02-15 13:31:59,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:59,289 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 148 treesize of output 128 [2022-02-15 13:31:59,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:31:59,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 100 [2022-02-15 13:31:59,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:31:59,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207600703] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:31:59,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:31:59,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:31:59,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314416166] [2022-02-15 13:31:59,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:31:59,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:31:59,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:31:59,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:31:59,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:31:59,409 INFO L87 Difference]: Start difference. First operand 1630 states and 5287 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:59,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:31:59,821 INFO L93 Difference]: Finished difference Result 1797 states and 5688 transitions. [2022-02-15 13:31:59,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:31:59,821 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:31:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:31:59,824 INFO L225 Difference]: With dead ends: 1797 [2022-02-15 13:31:59,824 INFO L226 Difference]: Without dead ends: 1723 [2022-02-15 13:31:59,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:31:59,824 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 66 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:31:59,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 236 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 485 Invalid, 0 Unknown, 216 Unchecked, 0.2s Time] [2022-02-15 13:31:59,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2022-02-15 13:31:59,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1630. [2022-02-15 13:31:59,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.245549416820135) internal successors, (5287), 1629 states have internal predecessors, (5287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:31:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5287 transitions. [2022-02-15 13:31:59,841 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5287 transitions. Word has length 24 [2022-02-15 13:31:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:31:59,842 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 5287 transitions. [2022-02-15 13:31:59,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:31:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5287 transitions. [2022-02-15 13:31:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:31:59,844 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:31:59,844 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:31:59,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-02-15 13:32:00,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-02-15 13:32:00,059 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:00,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:00,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1110876975, now seen corresponding path program 196 times [2022-02-15 13:32:00,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:00,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261686282] [2022-02-15 13:32:00,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:00,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:32:00,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:00,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261686282] [2022-02-15 13:32:00,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261686282] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:00,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961293345] [2022-02-15 13:32:00,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:32:00,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:00,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:00,353 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) [2022-02-15 13:32:00,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-02-15 13:32:00,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:32:00,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:00,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:32:00,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:00,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:00,481 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:32:00,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:00,612 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-15 13:32:00,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:00,615 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-02-15 13:32:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:32:00,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:01,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:01,347 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 133 treesize of output 123 [2022-02-15 13:32:01,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:01,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-02-15 13:32:01,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:01,652 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 90 treesize of output 78 [2022-02-15 13:32:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:32:01,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961293345] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:01,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:01,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:01,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055562525] [2022-02-15 13:32:01,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:01,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:01,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:01,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:01,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:01,752 INFO L87 Difference]: Start difference. First operand 1630 states and 5287 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:02,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:02,505 INFO L93 Difference]: Finished difference Result 1811 states and 5711 transitions. [2022-02-15 13:32:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:32:02,505 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:02,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:02,508 INFO L225 Difference]: With dead ends: 1811 [2022-02-15 13:32:02,508 INFO L226 Difference]: Without dead ends: 1746 [2022-02-15 13:32:02,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:32:02,509 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 68 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:02,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 295 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 830 Invalid, 0 Unknown, 198 Unchecked, 0.4s Time] [2022-02-15 13:32:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2022-02-15 13:32:02,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1634. [2022-02-15 13:32:02,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 3.243723208818126) internal successors, (5297), 1633 states have internal predecessors, (5297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:02,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 5297 transitions. [2022-02-15 13:32:02,530 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 5297 transitions. Word has length 24 [2022-02-15 13:32:02,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:02,530 INFO L470 AbstractCegarLoop]: Abstraction has 1634 states and 5297 transitions. [2022-02-15 13:32:02,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:02,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 5297 transitions. [2022-02-15 13:32:02,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:02,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:02,533 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:02,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:02,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:02,734 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:02,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:02,734 INFO L85 PathProgramCache]: Analyzing trace with hash 135828057, now seen corresponding path program 197 times [2022-02-15 13:32:02,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:02,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9433330] [2022-02-15 13:32:02,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:02,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:02,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:02,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9433330] [2022-02-15 13:32:02,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9433330] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:02,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276046995] [2022-02-15 13:32:02,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:32:02,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:02,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:02,951 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) [2022-02-15 13:32:02,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-02-15 13:32:02,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:32:02,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:02,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:32:02,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:03,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:03,065 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:32:03,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:03,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 37 [2022-02-15 13:32:03,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:03,119 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:32:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:03,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:03,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:03,762 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 70 treesize of output 68 [2022-02-15 13:32:03,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:03,876 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 76 treesize of output 69 [2022-02-15 13:32:03,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:03,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 53 [2022-02-15 13:32:03,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:03,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276046995] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:03,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:03,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:03,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369334937] [2022-02-15 13:32:03,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:03,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:03,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:03,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:03,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:03,971 INFO L87 Difference]: Start difference. First operand 1634 states and 5297 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:05,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:05,476 INFO L93 Difference]: Finished difference Result 2205 states and 6831 transitions. [2022-02-15 13:32:05,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:32:05,476 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:05,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:05,479 INFO L225 Difference]: With dead ends: 2205 [2022-02-15 13:32:05,479 INFO L226 Difference]: Without dead ends: 2042 [2022-02-15 13:32:05,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:32:05,480 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 219 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:05,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 382 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1297 Invalid, 0 Unknown, 5 Unchecked, 0.5s Time] [2022-02-15 13:32:05,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2022-02-15 13:32:05,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1636. [2022-02-15 13:32:05,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 3.2452599388379206) internal successors, (5306), 1635 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 5306 transitions. [2022-02-15 13:32:05,503 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 5306 transitions. Word has length 24 [2022-02-15 13:32:05,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:05,503 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 5306 transitions. [2022-02-15 13:32:05,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:05,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 5306 transitions. [2022-02-15 13:32:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:05,505 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:05,505 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:05,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:05,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-02-15 13:32:05,719 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:05,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:05,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1734909607, now seen corresponding path program 198 times [2022-02-15 13:32:05,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:05,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093434744] [2022-02-15 13:32:05,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:05,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:32:05,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:05,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093434744] [2022-02-15 13:32:05,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093434744] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:05,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084923940] [2022-02-15 13:32:05,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:32:05,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:05,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:05,943 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) [2022-02-15 13:32:05,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-02-15 13:32:05,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-02-15 13:32:05,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:05,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:32:05,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:06,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:06,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:32:06,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:06,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 37 [2022-02-15 13:32:06,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:06,155 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:32:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:32:06,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:07,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:07,059 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 102 treesize of output 96 [2022-02-15 13:32:07,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:07,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 126 [2022-02-15 13:32:07,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:07,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 98 [2022-02-15 13:32:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:32:07,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084923940] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:07,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:07,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:32:07,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435349765] [2022-02-15 13:32:07,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:07,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:32:07,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:07,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:32:07,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:32:07,307 INFO L87 Difference]: Start difference. First operand 1636 states and 5306 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) [2022-02-15 13:32:07,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:07,594 INFO L93 Difference]: Finished difference Result 1743 states and 5587 transitions. [2022-02-15 13:32:07,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:32:07,594 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 24 [2022-02-15 13:32:07,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:07,597 INFO L225 Difference]: With dead ends: 1743 [2022-02-15 13:32:07,597 INFO L226 Difference]: Without dead ends: 1705 [2022-02-15 13:32:07,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:07,598 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:07,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 167 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 584 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-02-15 13:32:07,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2022-02-15 13:32:07,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1636. [2022-02-15 13:32:07,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 3.2452599388379206) internal successors, (5306), 1635 states have internal predecessors, (5306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:07,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 5306 transitions. [2022-02-15 13:32:07,616 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 5306 transitions. Word has length 24 [2022-02-15 13:32:07,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:07,616 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 5306 transitions. [2022-02-15 13:32:07,616 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) [2022-02-15 13:32:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 5306 transitions. [2022-02-15 13:32:07,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:07,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:07,618 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:07,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:07,834 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,SelfDestructingSolverStorable213 [2022-02-15 13:32:07,834 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:07,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:07,834 INFO L85 PathProgramCache]: Analyzing trace with hash 20307343, now seen corresponding path program 199 times [2022-02-15 13:32:07,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:07,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239589091] [2022-02-15 13:32:07,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:07,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:08,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:08,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239589091] [2022-02-15 13:32:08,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239589091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:08,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208477354] [2022-02-15 13:32:08,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:32:08,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:08,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:08,049 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) [2022-02-15 13:32:08,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-02-15 13:32:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:08,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:32:08,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:08,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:08,180 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:32:08,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:08,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:32:08,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:08,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 treesize of output 7 [2022-02-15 13:32:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:08,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:09,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:09,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-15 13:32:09,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:09,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 97 [2022-02-15 13:32:09,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:09,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 77 [2022-02-15 13:32:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:09,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208477354] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:09,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:09,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:32:09,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760539814] [2022-02-15 13:32:09,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:09,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:32:09,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:09,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:32:09,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:32:09,227 INFO L87 Difference]: Start difference. First operand 1636 states and 5306 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) [2022-02-15 13:32:10,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:10,216 INFO L93 Difference]: Finished difference Result 2186 states and 6789 transitions. [2022-02-15 13:32:10,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:32:10,216 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 24 [2022-02-15 13:32:10,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:10,220 INFO L225 Difference]: With dead ends: 2186 [2022-02-15 13:32:10,220 INFO L226 Difference]: Without dead ends: 2010 [2022-02-15 13:32:10,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:32:10,220 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 201 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:10,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 236 Invalid, 807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 742 Invalid, 0 Unknown, 14 Unchecked, 0.3s Time] [2022-02-15 13:32:10,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2010 states. [2022-02-15 13:32:10,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2010 to 1648. [2022-02-15 13:32:10,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1647 states have (on average 3.247115968427444) internal successors, (5348), 1647 states have internal predecessors, (5348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:10,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 5348 transitions. [2022-02-15 13:32:10,242 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 5348 transitions. Word has length 24 [2022-02-15 13:32:10,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:10,242 INFO L470 AbstractCegarLoop]: Abstraction has 1648 states and 5348 transitions. [2022-02-15 13:32:10,242 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) [2022-02-15 13:32:10,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 5348 transitions. [2022-02-15 13:32:10,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:10,244 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:10,244 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:10,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:10,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:10,460 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:10,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:10,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1528256831, now seen corresponding path program 200 times [2022-02-15 13:32:10,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:10,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060537887] [2022-02-15 13:32:10,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:10,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:10,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:10,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060537887] [2022-02-15 13:32:10,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060537887] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:10,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910457316] [2022-02-15 13:32:10,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:32:10,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:10,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:10,609 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) [2022-02-15 13:32:10,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-02-15 13:32:10,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:32:10,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:10,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:32:10,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:10,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:10,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:32:10,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:10,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 23 [2022-02-15 13:32:10,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:10,884 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-02-15 13:32:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:10,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:11,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:11,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-02-15 13:32:11,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:11,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 127 [2022-02-15 13:32:11,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:11,471 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 119 treesize of output 99 [2022-02-15 13:32:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:11,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910457316] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:11,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:11,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:11,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505522505] [2022-02-15 13:32:11,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:11,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:11,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:11,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:11,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:11,548 INFO L87 Difference]: Start difference. First operand 1648 states and 5348 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:11,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:11,681 INFO L93 Difference]: Finished difference Result 1805 states and 5755 transitions. [2022-02-15 13:32:11,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:32:11,681 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:11,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:11,684 INFO L225 Difference]: With dead ends: 1805 [2022-02-15 13:32:11,684 INFO L226 Difference]: Without dead ends: 1747 [2022-02-15 13:32:11,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:32:11,684 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:11,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 150 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 354 Invalid, 0 Unknown, 147 Unchecked, 0.1s Time] [2022-02-15 13:32:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-02-15 13:32:11,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1658. [2022-02-15 13:32:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.2432106216053107) internal successors, (5374), 1657 states have internal predecessors, (5374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:11,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5374 transitions. [2022-02-15 13:32:11,703 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5374 transitions. Word has length 24 [2022-02-15 13:32:11,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:11,703 INFO L470 AbstractCegarLoop]: Abstraction has 1658 states and 5374 transitions. [2022-02-15 13:32:11,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:11,703 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5374 transitions. [2022-02-15 13:32:11,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:11,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:11,705 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:11,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:11,921 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,SelfDestructingSolverStorable215 [2022-02-15 13:32:11,921 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:11,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:11,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2091328537, now seen corresponding path program 201 times [2022-02-15 13:32:11,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:11,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993650652] [2022-02-15 13:32:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:11,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:12,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:12,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993650652] [2022-02-15 13:32:12,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993650652] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:12,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022993140] [2022-02-15 13:32:12,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:32:12,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:12,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:12,057 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) [2022-02-15 13:32:12,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-02-15 13:32:12,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:32:12,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:12,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:32:12,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:12,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:12,140 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:32:12,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:12,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 23 [2022-02-15 13:32:12,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:12,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-02-15 13:32:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:12,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:12,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:12,949 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 82 treesize of output 78 [2022-02-15 13:32:13,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:13,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 104 [2022-02-15 13:32:13,035 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:13,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 82 [2022-02-15 13:32:13,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:13,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022993140] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:13,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:13,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:13,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854036812] [2022-02-15 13:32:13,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:13,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:13,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:13,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:13,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:13,100 INFO L87 Difference]: Start difference. First operand 1658 states and 5374 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:13,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:13,380 INFO L93 Difference]: Finished difference Result 1873 states and 5907 transitions. [2022-02-15 13:32:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:32:13,381 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:13,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:13,383 INFO L225 Difference]: With dead ends: 1873 [2022-02-15 13:32:13,383 INFO L226 Difference]: Without dead ends: 1760 [2022-02-15 13:32:13,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:32:13,384 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 79 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:13,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 257 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 679 Invalid, 0 Unknown, 135 Unchecked, 0.2s Time] [2022-02-15 13:32:13,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1760 states. [2022-02-15 13:32:13,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1760 to 1657. [2022-02-15 13:32:13,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 3.244565217391304) internal successors, (5373), 1656 states have internal predecessors, (5373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:13,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 5373 transitions. [2022-02-15 13:32:13,403 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 5373 transitions. Word has length 24 [2022-02-15 13:32:13,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:13,403 INFO L470 AbstractCegarLoop]: Abstraction has 1657 states and 5373 transitions. [2022-02-15 13:32:13,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:13,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 5373 transitions. [2022-02-15 13:32:13,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:13,405 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:13,405 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:13,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-02-15 13:32:13,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:13,615 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:13,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:13,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2012659601, now seen corresponding path program 202 times [2022-02-15 13:32:13,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:13,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501475737] [2022-02-15 13:32:13,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:13,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:13,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:13,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:13,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501475737] [2022-02-15 13:32:13,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501475737] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:13,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287343891] [2022-02-15 13:32:13,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:32:13,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:13,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:13,812 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) [2022-02-15 13:32:13,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-02-15 13:32:13,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:32:13,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:13,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:32:13,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:13,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:13,908 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:32:14,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:14,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 37 [2022-02-15 13:32:14,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:14,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:32:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:14,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:14,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:14,407 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 78 treesize of output 74 [2022-02-15 13:32:14,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:14,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-15 13:32:14,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:14,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 78 [2022-02-15 13:32:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:14,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287343891] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:14,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:14,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:14,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337310572] [2022-02-15 13:32:14,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:14,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:14,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:14,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:14,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:14,568 INFO L87 Difference]: Start difference. First operand 1657 states and 5373 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:14,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:14,960 INFO L93 Difference]: Finished difference Result 1945 states and 6066 transitions. [2022-02-15 13:32:14,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:32:14,960 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:14,963 INFO L225 Difference]: With dead ends: 1945 [2022-02-15 13:32:14,963 INFO L226 Difference]: Without dead ends: 1816 [2022-02-15 13:32:14,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:32:14,964 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 80 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:14,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 289 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 665 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2022-02-15 13:32:14,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2022-02-15 13:32:14,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1659. [2022-02-15 13:32:14,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 3.243667068757539) internal successors, (5378), 1658 states have internal predecessors, (5378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 5378 transitions. [2022-02-15 13:32:14,985 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 5378 transitions. Word has length 24 [2022-02-15 13:32:14,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:14,985 INFO L470 AbstractCegarLoop]: Abstraction has 1659 states and 5378 transitions. [2022-02-15 13:32:14,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 5378 transitions. [2022-02-15 13:32:14,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:14,987 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:14,987 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:15,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:15,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-02-15 13:32:15,203 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:15,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:15,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1323649415, now seen corresponding path program 203 times [2022-02-15 13:32:15,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:15,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872727329] [2022-02-15 13:32:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:15,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:15,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:15,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:15,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872727329] [2022-02-15 13:32:15,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872727329] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:15,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825052733] [2022-02-15 13:32:15,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:32:15,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:15,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:15,415 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) [2022-02-15 13:32:15,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-02-15 13:32:15,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:32:15,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:15,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:32:15,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:15,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:15,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:32:15,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:15,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:32:15,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:15,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:32:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:15,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:16,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:16,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 77 [2022-02-15 13:32:16,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:16,208 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 88 treesize of output 79 [2022-02-15 13:32:16,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:16,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 61 [2022-02-15 13:32:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:16,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825052733] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:16,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:16,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:16,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483071006] [2022-02-15 13:32:16,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:16,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:16,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:16,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:16,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:16,284 INFO L87 Difference]: Start difference. First operand 1659 states and 5378 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:16,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:16,605 INFO L93 Difference]: Finished difference Result 1823 states and 5808 transitions. [2022-02-15 13:32:16,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:32:16,606 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:16,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:16,609 INFO L225 Difference]: With dead ends: 1823 [2022-02-15 13:32:16,609 INFO L226 Difference]: Without dead ends: 1765 [2022-02-15 13:32:16,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:32:16,609 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 57 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:16,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 237 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 485 Invalid, 0 Unknown, 121 Unchecked, 0.1s Time] [2022-02-15 13:32:16,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2022-02-15 13:32:16,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1667. [2022-02-15 13:32:16,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1667 states, 1666 states have (on average 3.241296518607443) internal successors, (5400), 1666 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1667 states to 1667 states and 5400 transitions. [2022-02-15 13:32:16,628 INFO L78 Accepts]: Start accepts. Automaton has 1667 states and 5400 transitions. Word has length 24 [2022-02-15 13:32:16,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:16,628 INFO L470 AbstractCegarLoop]: Abstraction has 1667 states and 5400 transitions. [2022-02-15 13:32:16,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:16,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1667 states and 5400 transitions. [2022-02-15 13:32:16,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:16,631 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:16,631 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:16,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:16,843 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,SelfDestructingSolverStorable218 [2022-02-15 13:32:16,843 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:16,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:16,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1942859483, now seen corresponding path program 204 times [2022-02-15 13:32:16,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:16,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26108119] [2022-02-15 13:32:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:16,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:16,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:16,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26108119] [2022-02-15 13:32:16,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26108119] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:16,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141412013] [2022-02-15 13:32:16,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:32:16,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:16,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:16,970 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) [2022-02-15 13:32:16,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-02-15 13:32:16,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:32:16,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:16,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:32:16,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:17,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:17,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:32:17,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:17,180 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:32:17,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:17,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 12 treesize of output 3 [2022-02-15 13:32:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:17,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:17,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:17,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-02-15 13:32:17,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:17,884 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 148 treesize of output 128 [2022-02-15 13:32:17,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:17,890 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 120 treesize of output 100 [2022-02-15 13:32:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:18,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141412013] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:18,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:18,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:18,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766359890] [2022-02-15 13:32:18,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:18,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:18,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:18,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:18,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:18,059 INFO L87 Difference]: Start difference. First operand 1667 states and 5400 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:18,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:18,398 INFO L93 Difference]: Finished difference Result 1777 states and 5687 transitions. [2022-02-15 13:32:18,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:32:18,398 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:18,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:18,401 INFO L225 Difference]: With dead ends: 1777 [2022-02-15 13:32:18,401 INFO L226 Difference]: Without dead ends: 1762 [2022-02-15 13:32:18,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:18,401 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:18,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 295 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 803 Invalid, 0 Unknown, 281 Unchecked, 0.3s Time] [2022-02-15 13:32:18,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2022-02-15 13:32:18,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1659. [2022-02-15 13:32:18,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 3.243667068757539) internal successors, (5378), 1658 states have internal predecessors, (5378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:18,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 5378 transitions. [2022-02-15 13:32:18,421 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 5378 transitions. Word has length 24 [2022-02-15 13:32:18,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:18,421 INFO L470 AbstractCegarLoop]: Abstraction has 1659 states and 5378 transitions. [2022-02-15 13:32:18,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:18,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 5378 transitions. [2022-02-15 13:32:18,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:18,423 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:18,423 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:18,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-02-15 13:32:18,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:18,638 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:18,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:18,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1680695765, now seen corresponding path program 205 times [2022-02-15 13:32:18,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:18,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938734563] [2022-02-15 13:32:18,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:18,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:18,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:18,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938734563] [2022-02-15 13:32:18,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938734563] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:18,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557508846] [2022-02-15 13:32:18,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:32:18,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:18,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:18,816 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) [2022-02-15 13:32:18,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-02-15 13:32:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:18,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:32:18,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:18,931 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 47 treesize of output 39 [2022-02-15 13:32:19,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-02-15 13:32:19,002 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 12 treesize of output 8 [2022-02-15 13:32:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:19,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:19,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:19,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 57 [2022-02-15 13:32:19,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:19,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 103 [2022-02-15 13:32:19,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:19,464 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 95 treesize of output 81 [2022-02-15 13:32:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:19,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557508846] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:19,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:19,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:32:19,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694184390] [2022-02-15 13:32:19,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:19,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:32:19,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:19,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:32:19,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:32:19,529 INFO L87 Difference]: Start difference. First operand 1659 states and 5378 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:19,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:19,939 INFO L93 Difference]: Finished difference Result 1824 states and 5820 transitions. [2022-02-15 13:32:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:32:19,939 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:32:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:19,942 INFO L225 Difference]: With dead ends: 1824 [2022-02-15 13:32:19,942 INFO L226 Difference]: Without dead ends: 1734 [2022-02-15 13:32:19,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:32:19,942 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:19,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 260 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:32:19,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2022-02-15 13:32:19,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1666. [2022-02-15 13:32:19,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 3.2432432432432434) internal successors, (5400), 1665 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:19,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 5400 transitions. [2022-02-15 13:32:19,961 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 5400 transitions. Word has length 24 [2022-02-15 13:32:19,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:19,961 INFO L470 AbstractCegarLoop]: Abstraction has 1666 states and 5400 transitions. [2022-02-15 13:32:19,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 5400 transitions. [2022-02-15 13:32:19,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:19,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:19,963 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:19,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:20,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:20,179 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:20,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:20,179 INFO L85 PathProgramCache]: Analyzing trace with hash -516762591, now seen corresponding path program 206 times [2022-02-15 13:32:20,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:20,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625327320] [2022-02-15 13:32:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:20,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:20,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:20,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625327320] [2022-02-15 13:32:20,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625327320] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:20,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830187381] [2022-02-15 13:32:20,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:32:20,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:20,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:20,260 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) [2022-02-15 13:32:20,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-02-15 13:32:20,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:32:20,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:20,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:32:20,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:20,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:20,394 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-15 13:32:20,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:20,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:32:20,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:20,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:32:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:20,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:20,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:20,836 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 57 treesize of output 57 [2022-02-15 13:32:20,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:20,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 73 [2022-02-15 13:32:20,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:20,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-02-15 13:32:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:21,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830187381] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:21,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:21,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:21,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719920448] [2022-02-15 13:32:21,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:21,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:21,032 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:21,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:21,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:21,032 INFO L87 Difference]: Start difference. First operand 1666 states and 5400 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:21,270 INFO L93 Difference]: Finished difference Result 1797 states and 5759 transitions. [2022-02-15 13:32:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:32:21,270 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:21,273 INFO L225 Difference]: With dead ends: 1797 [2022-02-15 13:32:21,273 INFO L226 Difference]: Without dead ends: 1731 [2022-02-15 13:32:21,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:32:21,273 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 55 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:21,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 185 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 640 Invalid, 0 Unknown, 4 Unchecked, 0.2s Time] [2022-02-15 13:32:21,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2022-02-15 13:32:21,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1668. [2022-02-15 13:32:21,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1667 states have (on average 3.2423515296940613) internal successors, (5405), 1667 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 5405 transitions. [2022-02-15 13:32:21,291 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 5405 transitions. Word has length 24 [2022-02-15 13:32:21,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:21,291 INFO L470 AbstractCegarLoop]: Abstraction has 1668 states and 5405 transitions. [2022-02-15 13:32:21,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 5405 transitions. [2022-02-15 13:32:21,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:21,293 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:21,293 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:21,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:21,499 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,SelfDestructingSolverStorable221 [2022-02-15 13:32:21,499 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:21,500 INFO L85 PathProgramCache]: Analyzing trace with hash 958854987, now seen corresponding path program 207 times [2022-02-15 13:32:21,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:21,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791513225] [2022-02-15 13:32:21,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:21,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:21,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:21,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:21,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791513225] [2022-02-15 13:32:21,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791513225] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:21,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178828531] [2022-02-15 13:32:21,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:32:21,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:21,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:21,634 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) [2022-02-15 13:32:21,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-02-15 13:32:21,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:32:21,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:21,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:32:21,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:21,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:32:21,811 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 54 treesize of output 46 [2022-02-15 13:32:21,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-02-15 13:32:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:21,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:22,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:22,218 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 108 treesize of output 102 [2022-02-15 13:32:22,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:22,409 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 119 treesize of output 105 [2022-02-15 13:32:22,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:22,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 83 [2022-02-15 13:32:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:22,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178828531] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:22,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:22,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:32:22,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795514663] [2022-02-15 13:32:22,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:22,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:32:22,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:22,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:32:22,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:32:22,477 INFO L87 Difference]: Start difference. First operand 1668 states and 5405 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:22,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:22,944 INFO L93 Difference]: Finished difference Result 1942 states and 6139 transitions. [2022-02-15 13:32:22,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:32:22,944 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:32:22,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:22,948 INFO L225 Difference]: With dead ends: 1942 [2022-02-15 13:32:22,948 INFO L226 Difference]: Without dead ends: 1858 [2022-02-15 13:32:22,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:32:22,948 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 103 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:22,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 224 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 780 Invalid, 0 Unknown, 20 Unchecked, 0.3s Time] [2022-02-15 13:32:22,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2022-02-15 13:32:22,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1672. [2022-02-15 13:32:22,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.2405745062836626) internal successors, (5415), 1671 states have internal predecessors, (5415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:22,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5415 transitions. [2022-02-15 13:32:22,967 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5415 transitions. Word has length 24 [2022-02-15 13:32:22,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:22,967 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 5415 transitions. [2022-02-15 13:32:22,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:22,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5415 transitions. [2022-02-15 13:32:22,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:22,969 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:22,969 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:22,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:23,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-02-15 13:32:23,183 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:23,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:23,183 INFO L85 PathProgramCache]: Analyzing trace with hash -205587277, now seen corresponding path program 208 times [2022-02-15 13:32:23,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:23,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857659968] [2022-02-15 13:32:23,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:23,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:23,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:23,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857659968] [2022-02-15 13:32:23,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857659968] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:23,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858130203] [2022-02-15 13:32:23,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:32:23,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:23,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:23,356 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) [2022-02-15 13:32:23,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-02-15 13:32:23,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:32:23,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:23,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:32:23,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:23,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:23,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 23 [2022-02-15 13:32:23,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:23,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 54 treesize of output 46 [2022-02-15 13:32:23,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:23,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2022-02-15 13:32:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:23,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:23,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:23,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-02-15 13:32:24,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:24,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-15 13:32:24,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:24,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 83 [2022-02-15 13:32:24,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:24,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858130203] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:24,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:24,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:32:24,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868991821] [2022-02-15 13:32:24,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:24,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:32:24,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:24,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:32:24,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:32:24,302 INFO L87 Difference]: Start difference. First operand 1672 states and 5415 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:24,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:24,960 INFO L93 Difference]: Finished difference Result 1865 states and 5912 transitions. [2022-02-15 13:32:24,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:32:24,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:32:24,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:24,963 INFO L225 Difference]: With dead ends: 1865 [2022-02-15 13:32:24,963 INFO L226 Difference]: Without dead ends: 1795 [2022-02-15 13:32:24,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:32:24,964 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:24,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 246 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 767 Invalid, 0 Unknown, 21 Unchecked, 0.3s Time] [2022-02-15 13:32:24,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2022-02-15 13:32:24,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 1672. [2022-02-15 13:32:24,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1671 states have (on average 3.241771394374626) internal successors, (5417), 1671 states have internal predecessors, (5417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:24,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 5417 transitions. [2022-02-15 13:32:24,982 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 5417 transitions. Word has length 24 [2022-02-15 13:32:24,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:24,982 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 5417 transitions. [2022-02-15 13:32:24,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:24,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 5417 transitions. [2022-02-15 13:32:24,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:24,984 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:24,984 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:25,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:25,200 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,SelfDestructingSolverStorable223 [2022-02-15 13:32:25,200 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:25,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:25,200 INFO L85 PathProgramCache]: Analyzing trace with hash -705554193, now seen corresponding path program 209 times [2022-02-15 13:32:25,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:25,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498557119] [2022-02-15 13:32:25,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:25,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:25,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:25,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498557119] [2022-02-15 13:32:25,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498557119] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:25,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591046879] [2022-02-15 13:32:25,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:32:25,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:25,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:25,355 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) [2022-02-15 13:32:25,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-02-15 13:32:25,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:32:25,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:25,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:32:25,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:25,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:25,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:32:25,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:25,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 22 [2022-02-15 13:32:25,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:25,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:32:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:25,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:26,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:26,233 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 80 treesize of output 76 [2022-02-15 13:32:26,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:26,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2022-02-15 13:32:26,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:26,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 60 [2022-02-15 13:32:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:26,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591046879] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:26,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:26,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:26,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99741459] [2022-02-15 13:32:26,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:26,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:26,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:26,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:26,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:26,463 INFO L87 Difference]: Start difference. First operand 1672 states and 5417 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:26,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:26,880 INFO L93 Difference]: Finished difference Result 1769 states and 5686 transitions. [2022-02-15 13:32:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:32:26,880 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:26,883 INFO L225 Difference]: With dead ends: 1769 [2022-02-15 13:32:26,883 INFO L226 Difference]: Without dead ends: 1710 [2022-02-15 13:32:26,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:32:26,884 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 49 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:26,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 225 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 638 Invalid, 0 Unknown, 236 Unchecked, 0.2s Time] [2022-02-15 13:32:26,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2022-02-15 13:32:26,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1673. [2022-02-15 13:32:26,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.242224880382775) internal successors, (5421), 1672 states have internal predecessors, (5421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:26,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5421 transitions. [2022-02-15 13:32:26,901 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5421 transitions. Word has length 24 [2022-02-15 13:32:26,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:26,901 INFO L470 AbstractCegarLoop]: Abstraction has 1673 states and 5421 transitions. [2022-02-15 13:32:26,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:26,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5421 transitions. [2022-02-15 13:32:26,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:26,903 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:26,903 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:26,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:27,109 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,SelfDestructingSolverStorable224 [2022-02-15 13:32:27,109 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:27,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:27,109 INFO L85 PathProgramCache]: Analyzing trace with hash 458378981, now seen corresponding path program 210 times [2022-02-15 13:32:27,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:27,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884590924] [2022-02-15 13:32:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:27,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:27,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:27,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884590924] [2022-02-15 13:32:27,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884590924] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:27,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030511115] [2022-02-15 13:32:27,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:32:27,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:27,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:27,307 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) [2022-02-15 13:32:27,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-02-15 13:32:27,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:32:27,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:27,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:32:27,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:27,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:27,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:32:27,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:27,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 41 [2022-02-15 13:32:27,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:27,538 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:32:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:27,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:28,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:28,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2022-02-15 13:32:28,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:28,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 77 [2022-02-15 13:32:28,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:28,360 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 68 treesize of output 59 [2022-02-15 13:32:28,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:28,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030511115] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:28,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:28,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:32:28,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880715586] [2022-02-15 13:32:28,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:28,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:32:28,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:28,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:32:28,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:32:28,470 INFO L87 Difference]: Start difference. First operand 1673 states and 5421 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) [2022-02-15 13:32:29,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:29,220 INFO L93 Difference]: Finished difference Result 1988 states and 6171 transitions. [2022-02-15 13:32:29,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:32:29,220 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 24 [2022-02-15 13:32:29,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:29,223 INFO L225 Difference]: With dead ends: 1988 [2022-02-15 13:32:29,223 INFO L226 Difference]: Without dead ends: 1877 [2022-02-15 13:32:29,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:32:29,224 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 111 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:29,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 293 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 828 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-02-15 13:32:29,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-02-15 13:32:29,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1675. [2022-02-15 13:32:29,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1675 states, 1674 states have (on average 3.240143369175627) internal successors, (5424), 1674 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 5424 transitions. [2022-02-15 13:32:29,244 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 5424 transitions. Word has length 24 [2022-02-15 13:32:29,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:29,244 INFO L470 AbstractCegarLoop]: Abstraction has 1675 states and 5424 transitions. [2022-02-15 13:32:29,244 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) [2022-02-15 13:32:29,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 5424 transitions. [2022-02-15 13:32:29,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:29,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:29,246 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:29,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:29,461 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,SelfDestructingSolverStorable225 [2022-02-15 13:32:29,461 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:29,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:29,461 INFO L85 PathProgramCache]: Analyzing trace with hash -397003349, now seen corresponding path program 211 times [2022-02-15 13:32:29,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:29,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275712051] [2022-02-15 13:32:29,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:29,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:29,728 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:29,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275712051] [2022-02-15 13:32:29,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275712051] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:29,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129475762] [2022-02-15 13:32:29,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:32:29,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:29,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:29,729 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) [2022-02-15 13:32:29,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-02-15 13:32:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:29,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:32:29,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:29,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:29,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:32:30,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:30,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:32:30,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:30,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 treesize of output 14 [2022-02-15 13:32:30,143 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:30,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:30,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:30,626 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 82 treesize of output 78 [2022-02-15 13:32:30,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:30,774 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 122 treesize of output 108 [2022-02-15 13:32:30,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:30,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 86 [2022-02-15 13:32:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:30,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129475762] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:30,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:30,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:30,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854294018] [2022-02-15 13:32:30,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:30,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:30,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:30,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:30,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:30,877 INFO L87 Difference]: Start difference. First operand 1675 states and 5424 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:31,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:31,336 INFO L93 Difference]: Finished difference Result 1880 states and 5970 transitions. [2022-02-15 13:32:31,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:32:31,336 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:31,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:31,339 INFO L225 Difference]: With dead ends: 1880 [2022-02-15 13:32:31,339 INFO L226 Difference]: Without dead ends: 1778 [2022-02-15 13:32:31,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:32:31,339 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 64 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:31,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 241 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 689 Invalid, 0 Unknown, 252 Unchecked, 0.3s Time] [2022-02-15 13:32:31,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2022-02-15 13:32:31,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1679. [2022-02-15 13:32:31,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 3.240166865315852) internal successors, (5437), 1678 states have internal predecessors, (5437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 5437 transitions. [2022-02-15 13:32:31,358 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 5437 transitions. Word has length 24 [2022-02-15 13:32:31,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:31,358 INFO L470 AbstractCegarLoop]: Abstraction has 1679 states and 5437 transitions. [2022-02-15 13:32:31,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:31,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 5437 transitions. [2022-02-15 13:32:31,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:31,360 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:31,360 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:31,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:31,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:31,575 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:31,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:31,575 INFO L85 PathProgramCache]: Analyzing trace with hash -616234577, now seen corresponding path program 212 times [2022-02-15 13:32:31,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:31,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479140810] [2022-02-15 13:32:31,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:31,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:31,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:31,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479140810] [2022-02-15 13:32:31,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479140810] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:31,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402536706] [2022-02-15 13:32:31,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:32:31,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:31,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:31,788 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) [2022-02-15 13:32:31,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-02-15 13:32:31,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:32:31,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:31,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:32:31,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:31,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:31,890 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:32:32,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:32,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 22 [2022-02-15 13:32:32,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:32,044 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:32:32,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:32,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:32,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:32,708 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 77 treesize of output 75 [2022-02-15 13:32:32,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:32,777 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 83 treesize of output 76 [2022-02-15 13:32:32,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:32,780 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 67 treesize of output 60 [2022-02-15 13:32:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:32,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402536706] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:32,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:32,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:32,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453998788] [2022-02-15 13:32:32,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:32,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:32,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:32,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:32,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:32,872 INFO L87 Difference]: Start difference. First operand 1679 states and 5437 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:33,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:33,209 INFO L93 Difference]: Finished difference Result 1755 states and 5642 transitions. [2022-02-15 13:32:33,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:32:33,210 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:33,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:33,212 INFO L225 Difference]: With dead ends: 1755 [2022-02-15 13:32:33,212 INFO L226 Difference]: Without dead ends: 1710 [2022-02-15 13:32:33,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:32:33,213 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:33,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 182 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 602 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-02-15 13:32:33,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2022-02-15 13:32:33,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1675. [2022-02-15 13:32:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1675 states, 1674 states have (on average 3.240143369175627) internal successors, (5424), 1674 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:33,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 5424 transitions. [2022-02-15 13:32:33,231 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 5424 transitions. Word has length 24 [2022-02-15 13:32:33,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:33,231 INFO L470 AbstractCegarLoop]: Abstraction has 1675 states and 5424 transitions. [2022-02-15 13:32:33,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:33,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 5424 transitions. [2022-02-15 13:32:33,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:33,233 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:33,233 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:33,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-02-15 13:32:33,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:33,439 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:33,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:33,439 INFO L85 PathProgramCache]: Analyzing trace with hash 742052065, now seen corresponding path program 213 times [2022-02-15 13:32:33,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:33,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976486956] [2022-02-15 13:32:33,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:33,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:33,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:33,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976486956] [2022-02-15 13:32:33,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976486956] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:33,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857270173] [2022-02-15 13:32:33,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:32:33,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:33,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:33,667 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) [2022-02-15 13:32:33,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-02-15 13:32:33,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 13:32:33,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:33,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:32:33,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:33,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:33,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:32:33,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:33,789 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:32:33,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:33,791 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:32:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:33,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:34,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:34,349 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 69 treesize of output 67 [2022-02-15 13:32:34,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:34,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 72 [2022-02-15 13:32:34,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:34,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 56 [2022-02-15 13:32:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:34,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857270173] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:34,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:34,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:34,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730200221] [2022-02-15 13:32:34,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:34,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:34,492 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:34,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:34,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:34,492 INFO L87 Difference]: Start difference. First operand 1675 states and 5424 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:34,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:34,838 INFO L93 Difference]: Finished difference Result 1819 states and 5814 transitions. [2022-02-15 13:32:34,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:32:34,839 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:34,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:34,841 INFO L225 Difference]: With dead ends: 1819 [2022-02-15 13:32:34,841 INFO L226 Difference]: Without dead ends: 1753 [2022-02-15 13:32:34,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:32:34,842 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:34,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 234 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 754 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-02-15 13:32:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2022-02-15 13:32:34,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1675. [2022-02-15 13:32:34,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1675 states, 1674 states have (on average 3.240143369175627) internal successors, (5424), 1674 states have internal predecessors, (5424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1675 states to 1675 states and 5424 transitions. [2022-02-15 13:32:34,860 INFO L78 Accepts]: Start accepts. Automaton has 1675 states and 5424 transitions. Word has length 24 [2022-02-15 13:32:34,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:34,861 INFO L470 AbstractCegarLoop]: Abstraction has 1675 states and 5424 transitions. [2022-02-15 13:32:34,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:34,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1675 states and 5424 transitions. [2022-02-15 13:32:34,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:34,863 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:34,863 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:34,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-02-15 13:32:35,075 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,SelfDestructingSolverStorable228 [2022-02-15 13:32:35,075 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:35,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:35,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1162785999, now seen corresponding path program 214 times [2022-02-15 13:32:35,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:35,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992946518] [2022-02-15 13:32:35,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:35,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:35,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:35,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992946518] [2022-02-15 13:32:35,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992946518] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:35,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827404773] [2022-02-15 13:32:35,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:32:35,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:35,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:35,218 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) [2022-02-15 13:32:35,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-02-15 13:32:35,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:32:35,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:35,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:32:35,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:35,291 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 23 treesize of output 19 [2022-02-15 13:32:35,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-15 13:32:35,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-15 13:32:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:35,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:35,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:35,843 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 101 treesize of output 95 [2022-02-15 13:32:36,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:36,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 124 [2022-02-15 13:32:36,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:36,012 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 116 treesize of output 96 [2022-02-15 13:32:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:36,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827404773] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:36,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:36,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:32:36,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498031416] [2022-02-15 13:32:36,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:36,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:32:36,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:36,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:32:36,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:32:36,107 INFO L87 Difference]: Start difference. First operand 1675 states and 5424 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:36,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:36,465 INFO L93 Difference]: Finished difference Result 1832 states and 5817 transitions. [2022-02-15 13:32:36,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:32:36,465 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:32:36,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:36,468 INFO L225 Difference]: With dead ends: 1832 [2022-02-15 13:32:36,468 INFO L226 Difference]: Without dead ends: 1727 [2022-02-15 13:32:36,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:32:36,468 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:36,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 276 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 684 Invalid, 0 Unknown, 180 Unchecked, 0.3s Time] [2022-02-15 13:32:36,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2022-02-15 13:32:36,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1678. [2022-02-15 13:32:36,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.24031007751938) internal successors, (5434), 1677 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 5434 transitions. [2022-02-15 13:32:36,485 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 5434 transitions. Word has length 24 [2022-02-15 13:32:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:36,485 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 5434 transitions. [2022-02-15 13:32:36,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 5434 transitions. [2022-02-15 13:32:36,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:36,487 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:36,487 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:36,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:36,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:36,699 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:36,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:36,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1471336843, now seen corresponding path program 215 times [2022-02-15 13:32:36,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:36,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440723390] [2022-02-15 13:32:36,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:36,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:36,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:36,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:36,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440723390] [2022-02-15 13:32:36,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440723390] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:36,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612224462] [2022-02-15 13:32:36,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:32:36,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:36,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:36,951 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) [2022-02-15 13:32:36,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-02-15 13:32:36,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:32:36,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:36,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:32:36,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:37,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:37,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:32:37,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:37,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 13:32:37,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:37,113 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:32:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:37,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:37,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:37,612 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 101 treesize of output 95 [2022-02-15 13:32:37,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:37,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 124 [2022-02-15 13:32:37,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:37,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 96 [2022-02-15 13:32:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:37,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612224462] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:37,820 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:37,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:37,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511694483] [2022-02-15 13:32:37,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:37,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:37,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:37,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:37,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:37,820 INFO L87 Difference]: Start difference. First operand 1678 states and 5434 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:38,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:38,548 INFO L93 Difference]: Finished difference Result 1873 states and 5929 transitions. [2022-02-15 13:32:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:32:38,548 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:38,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:38,551 INFO L225 Difference]: With dead ends: 1873 [2022-02-15 13:32:38,551 INFO L226 Difference]: Without dead ends: 1772 [2022-02-15 13:32:38,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:32:38,551 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 142 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:38,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 228 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 747 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-02-15 13:32:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2022-02-15 13:32:38,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1678. [2022-02-15 13:32:38,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.24031007751938) internal successors, (5434), 1677 states have internal predecessors, (5434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:38,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 5434 transitions. [2022-02-15 13:32:38,569 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 5434 transitions. Word has length 24 [2022-02-15 13:32:38,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:38,569 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 5434 transitions. [2022-02-15 13:32:38,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:38,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 5434 transitions. [2022-02-15 13:32:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:38,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:38,571 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:38,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:38,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:38,787 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:38,788 INFO L85 PathProgramCache]: Analyzing trace with hash -399400821, now seen corresponding path program 216 times [2022-02-15 13:32:38,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:38,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685884327] [2022-02-15 13:32:38,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:38,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:32:38,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:38,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685884327] [2022-02-15 13:32:38,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685884327] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:38,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490338795] [2022-02-15 13:32:38,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:32:38,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:38,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:38,999 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) [2022-02-15 13:32:39,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-02-15 13:32:39,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:32:39,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:39,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:32:39,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:39,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:32:39,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 13:32:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:32:39,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:39,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:39,907 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 133 treesize of output 123 [2022-02-15 13:32:40,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:40,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2022-02-15 13:32:40,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:40,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 83 [2022-02-15 13:32:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:32:40,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490338795] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:40,138 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:40,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:32:40,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11235804] [2022-02-15 13:32:40,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:40,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:32:40,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:40,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:32:40,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:32:40,152 INFO L87 Difference]: Start difference. First operand 1678 states and 5434 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:41,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:41,573 INFO L93 Difference]: Finished difference Result 2711 states and 8094 transitions. [2022-02-15 13:32:41,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 13:32:41,573 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:32:41,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:41,577 INFO L225 Difference]: With dead ends: 2711 [2022-02-15 13:32:41,577 INFO L226 Difference]: Without dead ends: 2480 [2022-02-15 13:32:41,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:32:41,588 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 204 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:41,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 463 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:32:41,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2022-02-15 13:32:41,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 1691. [2022-02-15 13:32:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 3.253846153846154) internal successors, (5499), 1690 states have internal predecessors, (5499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:41,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 5499 transitions. [2022-02-15 13:32:41,614 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 5499 transitions. Word has length 24 [2022-02-15 13:32:41,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:41,615 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 5499 transitions. [2022-02-15 13:32:41,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:41,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 5499 transitions. [2022-02-15 13:32:41,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:41,617 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:41,617 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:41,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-02-15 13:32:41,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:41,833 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:41,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:41,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1026952223, now seen corresponding path program 217 times [2022-02-15 13:32:41,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:41,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284952231] [2022-02-15 13:32:41,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:41,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:42,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:42,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284952231] [2022-02-15 13:32:42,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284952231] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:42,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108627558] [2022-02-15 13:32:42,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:32:42,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:42,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:42,019 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) [2022-02-15 13:32:42,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-02-15 13:32:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:42,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:32:42,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:42,104 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 41 treesize of output 35 [2022-02-15 13:32:42,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:32:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:42,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:42,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:42,574 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 111 treesize of output 97 [2022-02-15 13:32:42,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:42,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-02-15 13:32:42,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:42,691 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 38 treesize of output 38 [2022-02-15 13:32:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:42,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108627558] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:42,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:42,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:32:42,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975050401] [2022-02-15 13:32:42,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:42,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:32:42,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:42,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:32:42,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:32:42,717 INFO L87 Difference]: Start difference. First operand 1691 states and 5499 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:43,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:43,483 INFO L93 Difference]: Finished difference Result 1963 states and 6227 transitions. [2022-02-15 13:32:43,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:32:43,483 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:32:43,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:43,487 INFO L225 Difference]: With dead ends: 1963 [2022-02-15 13:32:43,487 INFO L226 Difference]: Without dead ends: 1846 [2022-02-15 13:32:43,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:32:43,496 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 105 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:43,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 258 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:32:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2022-02-15 13:32:43,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1702. [2022-02-15 13:32:43,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1701 states have (on average 3.2569077013521457) internal successors, (5540), 1701 states have internal predecessors, (5540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:43,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 5540 transitions. [2022-02-15 13:32:43,532 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 5540 transitions. Word has length 24 [2022-02-15 13:32:43,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:43,532 INFO L470 AbstractCegarLoop]: Abstraction has 1702 states and 5540 transitions. [2022-02-15 13:32:43,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:43,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 5540 transitions. [2022-02-15 13:32:43,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:43,534 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:43,534 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:43,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:43,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-02-15 13:32:43,747 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:43,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:43,748 INFO L85 PathProgramCache]: Analyzing trace with hash 136980951, now seen corresponding path program 218 times [2022-02-15 13:32:43,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:43,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879721271] [2022-02-15 13:32:43,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:43,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:43,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:43,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879721271] [2022-02-15 13:32:43,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879721271] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:43,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283794615] [2022-02-15 13:32:43,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:32:43,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:43,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:43,934 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) [2022-02-15 13:32:43,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-02-15 13:32:43,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:32:43,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:43,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:32:43,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:44,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:32:44,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:32:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:44,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:44,688 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:44,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-02-15 13:32:44,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:44,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-15 13:32:44,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:44,773 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 28 treesize of output 30 [2022-02-15 13:32:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:44,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283794615] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:44,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:44,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:32:44,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266387050] [2022-02-15 13:32:44,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:44,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:32:44,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:44,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:32:44,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:32:44,810 INFO L87 Difference]: Start difference. First operand 1702 states and 5540 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:45,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:45,428 INFO L93 Difference]: Finished difference Result 2070 states and 6555 transitions. [2022-02-15 13:32:45,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:32:45,428 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:32:45,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:45,432 INFO L225 Difference]: With dead ends: 2070 [2022-02-15 13:32:45,432 INFO L226 Difference]: Without dead ends: 1977 [2022-02-15 13:32:45,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:32:45,433 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 106 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:45,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 294 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:32:45,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2022-02-15 13:32:45,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1714. [2022-02-15 13:32:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 3.2568593111500292) internal successors, (5579), 1713 states have internal predecessors, (5579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 5579 transitions. [2022-02-15 13:32:45,454 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 5579 transitions. Word has length 24 [2022-02-15 13:32:45,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:45,454 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 5579 transitions. [2022-02-15 13:32:45,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 5579 transitions. [2022-02-15 13:32:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:45,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:45,456 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:45,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:45,672 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,SelfDestructingSolverStorable233 [2022-02-15 13:32:45,672 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:45,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:45,673 INFO L85 PathProgramCache]: Analyzing trace with hash -937632607, now seen corresponding path program 219 times [2022-02-15 13:32:45,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:45,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83664324] [2022-02-15 13:32:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:45,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:45,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:45,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83664324] [2022-02-15 13:32:45,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83664324] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:45,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682426127] [2022-02-15 13:32:45,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:32:45,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:45,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:45,885 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) [2022-02-15 13:32:45,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-02-15 13:32:45,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:32:45,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:45,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:32:45,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:45,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:45,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:32:46,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:46,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 22 [2022-02-15 13:32:46,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:46,174 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:32:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:46,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:46,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:46,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 99 [2022-02-15 13:32:47,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:47,105 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 46 treesize of output 46 [2022-02-15 13:32:47,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:47,109 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 38 treesize of output 38 [2022-02-15 13:32:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:47,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682426127] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:47,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:47,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:47,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536475864] [2022-02-15 13:32:47,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:47,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:47,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:47,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:47,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:47,149 INFO L87 Difference]: Start difference. First operand 1714 states and 5579 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:47,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:47,923 INFO L93 Difference]: Finished difference Result 2073 states and 6547 transitions. [2022-02-15 13:32:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:32:47,924 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:47,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:47,927 INFO L225 Difference]: With dead ends: 2073 [2022-02-15 13:32:47,927 INFO L226 Difference]: Without dead ends: 1920 [2022-02-15 13:32:47,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:32:47,927 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 135 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:47,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 280 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 858 Invalid, 0 Unknown, 37 Unchecked, 0.4s Time] [2022-02-15 13:32:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2022-02-15 13:32:47,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1721. [2022-02-15 13:32:47,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 3.2598837209302327) internal successors, (5607), 1720 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5607 transitions. [2022-02-15 13:32:47,947 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5607 transitions. Word has length 24 [2022-02-15 13:32:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:47,948 INFO L470 AbstractCegarLoop]: Abstraction has 1721 states and 5607 transitions. [2022-02-15 13:32:47,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5607 transitions. [2022-02-15 13:32:47,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:47,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:47,950 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:47,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:48,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-02-15 13:32:48,166 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:48,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:48,166 INFO L85 PathProgramCache]: Analyzing trace with hash 420654035, now seen corresponding path program 220 times [2022-02-15 13:32:48,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:48,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287336683] [2022-02-15 13:32:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:48,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:48,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:48,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:48,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287336683] [2022-02-15 13:32:48,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287336683] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:48,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263211097] [2022-02-15 13:32:48,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:32:48,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:48,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:48,387 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) [2022-02-15 13:32:48,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-02-15 13:32:48,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:32:48,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:48,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:32:48,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:48,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:48,481 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:32:48,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:48,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 41 [2022-02-15 13:32:48,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:48,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:32:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:48,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:49,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:49,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 99 [2022-02-15 13:32:49,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:49,217 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 56 treesize of output 54 [2022-02-15 13:32:49,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:49,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 44 [2022-02-15 13:32:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:49,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263211097] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:49,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:49,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:49,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431823959] [2022-02-15 13:32:49,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:49,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:49,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:49,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:49,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:49,248 INFO L87 Difference]: Start difference. First operand 1721 states and 5607 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:50,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:50,348 INFO L93 Difference]: Finished difference Result 2436 states and 7432 transitions. [2022-02-15 13:32:50,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 13:32:50,348 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:50,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:50,352 INFO L225 Difference]: With dead ends: 2436 [2022-02-15 13:32:50,352 INFO L226 Difference]: Without dead ends: 2263 [2022-02-15 13:32:50,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:32:50,352 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 192 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:50,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 355 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1067 Invalid, 0 Unknown, 116 Unchecked, 0.3s Time] [2022-02-15 13:32:50,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2263 states. [2022-02-15 13:32:50,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2263 to 1724. [2022-02-15 13:32:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 3.260011607661056) internal successors, (5617), 1723 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:50,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 5617 transitions. [2022-02-15 13:32:50,376 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 5617 transitions. Word has length 24 [2022-02-15 13:32:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:50,376 INFO L470 AbstractCegarLoop]: Abstraction has 1724 states and 5617 transitions. [2022-02-15 13:32:50,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 5617 transitions. [2022-02-15 13:32:50,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:50,378 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:50,378 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:50,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:50,594 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,SelfDestructingSolverStorable235 [2022-02-15 13:32:50,594 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:50,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:50,595 INFO L85 PathProgramCache]: Analyzing trace with hash -152270729, now seen corresponding path program 221 times [2022-02-15 13:32:50,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:50,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370029721] [2022-02-15 13:32:50,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:50,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:50,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:50,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:50,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370029721] [2022-02-15 13:32:50,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370029721] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:50,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233887281] [2022-02-15 13:32:50,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:32:50,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:50,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:50,759 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) [2022-02-15 13:32:50,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-02-15 13:32:50,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:32:50,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:50,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:32:50,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:50,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:50,844 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:32:50,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:50,883 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:32:50,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:50,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:32:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:51,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:51,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:51,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 72 [2022-02-15 13:32:51,567 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:51,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-15 13:32:51,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:51,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 13:32:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:51,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233887281] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:51,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:51,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:51,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910881364] [2022-02-15 13:32:51,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:51,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:51,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:51,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:51,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:51,614 INFO L87 Difference]: Start difference. First operand 1724 states and 5617 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:51,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:51,899 INFO L93 Difference]: Finished difference Result 1855 states and 5970 transitions. [2022-02-15 13:32:51,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:32:51,900 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:51,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:51,902 INFO L225 Difference]: With dead ends: 1855 [2022-02-15 13:32:51,902 INFO L226 Difference]: Without dead ends: 1793 [2022-02-15 13:32:51,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:32:51,903 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 85 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:51,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 168 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 622 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2022-02-15 13:32:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2022-02-15 13:32:51,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1722. [2022-02-15 13:32:51,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1722 states, 1721 states have (on average 3.26089482858803) internal successors, (5612), 1721 states have internal predecessors, (5612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1722 states to 1722 states and 5612 transitions. [2022-02-15 13:32:51,922 INFO L78 Accepts]: Start accepts. Automaton has 1722 states and 5612 transitions. Word has length 24 [2022-02-15 13:32:51,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:51,922 INFO L470 AbstractCegarLoop]: Abstraction has 1722 states and 5612 transitions. [2022-02-15 13:32:51,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:51,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1722 states and 5612 transitions. [2022-02-15 13:32:51,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:51,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:51,924 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:51,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:52,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:52,140 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:52,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:52,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1857882453, now seen corresponding path program 222 times [2022-02-15 13:32:52,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:52,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937463509] [2022-02-15 13:32:52,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:52,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:52,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:52,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937463509] [2022-02-15 13:32:52,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937463509] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:52,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878789223] [2022-02-15 13:32:52,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:32:52,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:52,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:52,273 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) [2022-02-15 13:32:52,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-02-15 13:32:52,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:32:52,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:52,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:32:52,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:52,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:52,428 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:32:52,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:52,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:32:52,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:52,493 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 10 [2022-02-15 13:32:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:52,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:52,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:52,832 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 141 treesize of output 121 [2022-02-15 13:32:52,997 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:52,998 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 34 treesize of output 36 [2022-02-15 13:32:53,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:53,001 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 28 treesize of output 30 [2022-02-15 13:32:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:53,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878789223] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:53,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:53,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:32:53,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461536980] [2022-02-15 13:32:53,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:53,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:32:53,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:53,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:32:53,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:32:53,042 INFO L87 Difference]: Start difference. First operand 1722 states and 5612 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-02-15 13:32:53,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:53,255 INFO L93 Difference]: Finished difference Result 1844 states and 5938 transitions. [2022-02-15 13:32:53,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:32:53,255 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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 24 [2022-02-15 13:32:53,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:53,258 INFO L225 Difference]: With dead ends: 1844 [2022-02-15 13:32:53,258 INFO L226 Difference]: Without dead ends: 1798 [2022-02-15 13:32:53,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:32:53,258 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:53,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 202 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 543 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-02-15 13:32:53,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2022-02-15 13:32:53,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1713. [2022-02-15 13:32:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1712 states have (on average 3.259929906542056) internal successors, (5581), 1712 states have internal predecessors, (5581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:53,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 5581 transitions. [2022-02-15 13:32:53,277 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 5581 transitions. Word has length 24 [2022-02-15 13:32:53,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:53,278 INFO L470 AbstractCegarLoop]: Abstraction has 1713 states and 5581 transitions. [2022-02-15 13:32:53,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-02-15 13:32:53,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 5581 transitions. [2022-02-15 13:32:53,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:53,280 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:53,280 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:53,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:53,495 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,SelfDestructingSolverStorable237 [2022-02-15 13:32:53,495 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:53,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:53,496 INFO L85 PathProgramCache]: Analyzing trace with hash -532358289, now seen corresponding path program 223 times [2022-02-15 13:32:53,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:53,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590677843] [2022-02-15 13:32:53,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:53,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:53,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:53,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590677843] [2022-02-15 13:32:53,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590677843] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:53,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29026633] [2022-02-15 13:32:53,704 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:32:53,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:53,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:53,705 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) [2022-02-15 13:32:53,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-02-15 13:32:53,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:53,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:32:53,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:53,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:53,859 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:32:54,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:54,006 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:32:54,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:54,009 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:32:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:54,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:54,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:54,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-02-15 13:32:54,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:54,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-02-15 13:32:54,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:54,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-02-15 13:32:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:54,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29026633] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:54,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:54,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:54,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114123866] [2022-02-15 13:32:54,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:54,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:54,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:54,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:54,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:54,965 INFO L87 Difference]: Start difference. First operand 1713 states and 5581 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:55,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:55,865 INFO L93 Difference]: Finished difference Result 2124 states and 6695 transitions. [2022-02-15 13:32:55,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:32:55,865 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:55,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:55,869 INFO L225 Difference]: With dead ends: 2124 [2022-02-15 13:32:55,869 INFO L226 Difference]: Without dead ends: 1975 [2022-02-15 13:32:55,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:32:55,869 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 134 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:55,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 303 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 768 Invalid, 0 Unknown, 253 Unchecked, 0.3s Time] [2022-02-15 13:32:55,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2022-02-15 13:32:55,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1713. [2022-02-15 13:32:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1712 states have (on average 3.259929906542056) internal successors, (5581), 1712 states have internal predecessors, (5581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:55,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 5581 transitions. [2022-02-15 13:32:55,889 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 5581 transitions. Word has length 24 [2022-02-15 13:32:55,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:55,889 INFO L470 AbstractCegarLoop]: Abstraction has 1713 states and 5581 transitions. [2022-02-15 13:32:55,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:55,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 5581 transitions. [2022-02-15 13:32:55,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:55,891 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:55,891 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:55,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-02-15 13:32:56,107 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,SelfDestructingSolverStorable238 [2022-02-15 13:32:56,108 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:56,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:56,108 INFO L85 PathProgramCache]: Analyzing trace with hash 2136973911, now seen corresponding path program 224 times [2022-02-15 13:32:56,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:56,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022071492] [2022-02-15 13:32:56,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:56,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:56,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:56,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022071492] [2022-02-15 13:32:56,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022071492] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:56,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203323062] [2022-02-15 13:32:56,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:32:56,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:56,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:56,224 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) [2022-02-15 13:32:56,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-02-15 13:32:56,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:32:56,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:56,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:32:56,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:56,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:32:56,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:32:56,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:56,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:56,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:56,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-15 13:32:56,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:56,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-15 13:32:56,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:56,833 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 28 treesize of output 30 [2022-02-15 13:32:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:56,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203323062] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:56,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:56,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:32:56,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345369806] [2022-02-15 13:32:56,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:56,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:32:56,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:32:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:32:56,861 INFO L87 Difference]: Start difference. First operand 1713 states and 5581 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) [2022-02-15 13:32:57,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:57,210 INFO L93 Difference]: Finished difference Result 1888 states and 6088 transitions. [2022-02-15 13:32:57,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:32:57,211 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 24 [2022-02-15 13:32:57,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:57,214 INFO L225 Difference]: With dead ends: 1888 [2022-02-15 13:32:57,214 INFO L226 Difference]: Without dead ends: 1812 [2022-02-15 13:32:57,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:32:57,214 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 88 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:57,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 209 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:32:57,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-02-15 13:32:57,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1720. [2022-02-15 13:32:57,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 3.2629435718440956) internal successors, (5609), 1719 states have internal predecessors, (5609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 5609 transitions. [2022-02-15 13:32:57,234 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 5609 transitions. Word has length 24 [2022-02-15 13:32:57,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:57,234 INFO L470 AbstractCegarLoop]: Abstraction has 1720 states and 5609 transitions. [2022-02-15 13:32:57,235 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) [2022-02-15 13:32:57,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 5609 transitions. [2022-02-15 13:32:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:57,237 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:57,237 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:57,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-02-15 13:32:57,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:57,441 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:57,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:57,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1555213131, now seen corresponding path program 225 times [2022-02-15 13:32:57,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:57,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155421024] [2022-02-15 13:32:57,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:57,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:57,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:57,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:57,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155421024] [2022-02-15 13:32:57,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155421024] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:57,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87502628] [2022-02-15 13:32:57,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:32:57,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:57,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:57,666 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) [2022-02-15 13:32:57,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-02-15 13:32:57,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:32:57,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:32:57,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:32:57,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:32:57,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:32:57,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:57,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 37 [2022-02-15 13:32:57,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:32:57,823 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:32:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:57,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:32:58,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:58,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-02-15 13:32:58,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:58,516 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 34 treesize of output 36 [2022-02-15 13:32:58,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:32:58,519 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 28 treesize of output 30 [2022-02-15 13:32:58,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:58,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87502628] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:32:58,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:32:58,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:32:58,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616914656] [2022-02-15 13:32:58,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:32:58,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:32:58,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:32:58,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:32:58,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:32:58,559 INFO L87 Difference]: Start difference. First operand 1720 states and 5609 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:59,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:32:59,541 INFO L93 Difference]: Finished difference Result 1992 states and 6397 transitions. [2022-02-15 13:32:59,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:32:59,542 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:32:59,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:32:59,545 INFO L225 Difference]: With dead ends: 1992 [2022-02-15 13:32:59,545 INFO L226 Difference]: Without dead ends: 1895 [2022-02-15 13:32:59,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:32:59,545 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 117 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:32:59,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 289 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1016 Invalid, 0 Unknown, 62 Unchecked, 0.4s Time] [2022-02-15 13:32:59,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2022-02-15 13:32:59,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1721. [2022-02-15 13:32:59,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 3.2633720930232557) internal successors, (5613), 1720 states have internal predecessors, (5613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:32:59,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5613 transitions. [2022-02-15 13:32:59,568 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5613 transitions. Word has length 24 [2022-02-15 13:32:59,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:32:59,568 INFO L470 AbstractCegarLoop]: Abstraction has 1721 states and 5613 transitions. [2022-02-15 13:32:59,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:32:59,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5613 transitions. [2022-02-15 13:32:59,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:32:59,570 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:32:59,570 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:32:59,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-02-15 13:32:59,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:59,775 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:32:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:32:59,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1439692417, now seen corresponding path program 226 times [2022-02-15 13:32:59,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:32:59,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651577214] [2022-02-15 13:32:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:32:59,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:32:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:32:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:32:59,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:32:59,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651577214] [2022-02-15 13:32:59,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651577214] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:32:59,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951540509] [2022-02-15 13:32:59,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:32:59,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:32:59,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:32:59,989 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) [2022-02-15 13:32:59,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-02-15 13:33:00,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:33:00,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:00,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:00,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:00,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:33:00,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:00,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:33:00,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:00,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:33:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:00,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:00,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:00,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-15 13:33:00,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:00,967 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 34 treesize of output 36 [2022-02-15 13:33:00,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:00,970 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 28 treesize of output 30 [2022-02-15 13:33:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:01,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951540509] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:01,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:01,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:01,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53204829] [2022-02-15 13:33:01,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:01,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:01,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:01,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:01,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:01,002 INFO L87 Difference]: Start difference. First operand 1721 states and 5613 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:01,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:01,521 INFO L93 Difference]: Finished difference Result 1909 states and 6150 transitions. [2022-02-15 13:33:01,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:33:01,521 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:01,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:01,524 INFO L225 Difference]: With dead ends: 1909 [2022-02-15 13:33:01,525 INFO L226 Difference]: Without dead ends: 1824 [2022-02-15 13:33:01,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:33:01,525 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 92 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:01,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 228 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 796 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2022-02-15 13:33:01,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2022-02-15 13:33:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1728. [2022-02-15 13:33:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 3.2663578459756804) internal successors, (5641), 1727 states have internal predecessors, (5641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 5641 transitions. [2022-02-15 13:33:01,545 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 5641 transitions. Word has length 24 [2022-02-15 13:33:01,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:01,545 INFO L470 AbstractCegarLoop]: Abstraction has 1728 states and 5641 transitions. [2022-02-15 13:33:01,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:01,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 5641 transitions. [2022-02-15 13:33:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:01,548 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:01,548 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:01,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:01,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:01,763 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:01,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:01,764 INFO L85 PathProgramCache]: Analyzing trace with hash -108871757, now seen corresponding path program 227 times [2022-02-15 13:33:01,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:01,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047607829] [2022-02-15 13:33:01,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:01,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:01,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:01,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047607829] [2022-02-15 13:33:01,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047607829] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:01,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765849678] [2022-02-15 13:33:01,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:33:01,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:01,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:01,959 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) [2022-02-15 13:33:01,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-02-15 13:33:02,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:33:02,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:02,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:02,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:02,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:33:02,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:02,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:33:02,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:02,264 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:33:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:02,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:02,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:02,837 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 79 treesize of output 70 [2022-02-15 13:33:02,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:02,929 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 34 treesize of output 36 [2022-02-15 13:33:02,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:02,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 13:33:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:02,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765849678] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:02,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:02,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:02,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716043044] [2022-02-15 13:33:02,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:02,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:02,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:02,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:02,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:02,984 INFO L87 Difference]: Start difference. First operand 1728 states and 5641 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:03,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:03,826 INFO L93 Difference]: Finished difference Result 1974 states and 6274 transitions. [2022-02-15 13:33:03,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:33:03,826 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:03,829 INFO L225 Difference]: With dead ends: 1974 [2022-02-15 13:33:03,829 INFO L226 Difference]: Without dead ends: 1901 [2022-02-15 13:33:03,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:33:03,829 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 84 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:03,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 336 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 873 Invalid, 0 Unknown, 166 Unchecked, 0.3s Time] [2022-02-15 13:33:03,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2022-02-15 13:33:03,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1721. [2022-02-15 13:33:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 3.2633720930232557) internal successors, (5613), 1720 states have internal predecessors, (5613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5613 transitions. [2022-02-15 13:33:03,848 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5613 transitions. Word has length 24 [2022-02-15 13:33:03,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:03,849 INFO L470 AbstractCegarLoop]: Abstraction has 1721 states and 5613 transitions. [2022-02-15 13:33:03,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:03,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5613 transitions. [2022-02-15 13:33:03,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:03,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:03,851 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:03,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-02-15 13:33:04,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:04,063 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:04,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:04,063 INFO L85 PathProgramCache]: Analyzing trace with hash -593274527, now seen corresponding path program 228 times [2022-02-15 13:33:04,063 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:04,063 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796785120] [2022-02-15 13:33:04,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:04,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:04,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:04,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796785120] [2022-02-15 13:33:04,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796785120] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:04,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869839685] [2022-02-15 13:33:04,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:33:04,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:04,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:04,286 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) [2022-02-15 13:33:04,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-02-15 13:33:04,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:33:04,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:04,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:33:04,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:04,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:33:04,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:04,588 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:33:04,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:04,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:33:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:04,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:05,181 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:05,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-15 13:33:05,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:05,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 52 [2022-02-15 13:33:05,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:05,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-02-15 13:33:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:05,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869839685] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:05,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:05,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:05,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528576868] [2022-02-15 13:33:05,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:05,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:05,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:05,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:05,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:05,322 INFO L87 Difference]: Start difference. First operand 1721 states and 5613 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:05,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:05,828 INFO L93 Difference]: Finished difference Result 1938 states and 6159 transitions. [2022-02-15 13:33:05,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:33:05,828 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:05,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:05,831 INFO L225 Difference]: With dead ends: 1938 [2022-02-15 13:33:05,831 INFO L226 Difference]: Without dead ends: 1856 [2022-02-15 13:33:05,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:33:05,832 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 103 mSDsluCounter, 733 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:05,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 472 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 967 Invalid, 0 Unknown, 175 Unchecked, 0.3s Time] [2022-02-15 13:33:05,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2022-02-15 13:33:05,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1723. [2022-02-15 13:33:05,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 3.262485481997677) internal successors, (5618), 1722 states have internal predecessors, (5618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 5618 transitions. [2022-02-15 13:33:05,851 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 5618 transitions. Word has length 24 [2022-02-15 13:33:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:05,851 INFO L470 AbstractCegarLoop]: Abstraction has 1723 states and 5618 transitions. [2022-02-15 13:33:05,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:05,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 5618 transitions. [2022-02-15 13:33:05,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:05,854 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:05,854 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:05,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-02-15 13:33:06,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:06,070 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:06,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:06,070 INFO L85 PathProgramCache]: Analyzing trace with hash 95735659, now seen corresponding path program 229 times [2022-02-15 13:33:06,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:06,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030787308] [2022-02-15 13:33:06,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:06,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:06,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:06,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:06,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030787308] [2022-02-15 13:33:06,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030787308] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:06,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344860944] [2022-02-15 13:33:06,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:33:06,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:06,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:06,254 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) [2022-02-15 13:33:06,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-02-15 13:33:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:06,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:06,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:06,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:33:06,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:06,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 23 [2022-02-15 13:33:06,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:06,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-02-15 13:33:06,631 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:06,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:07,045 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:07,045 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 141 treesize of output 121 [2022-02-15 13:33:07,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:07,228 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 34 treesize of output 36 [2022-02-15 13:33:07,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:07,232 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 28 treesize of output 30 [2022-02-15 13:33:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:07,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344860944] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:07,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:07,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:07,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009449583] [2022-02-15 13:33:07,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:07,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:07,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:07,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:07,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:07,290 INFO L87 Difference]: Start difference. First operand 1723 states and 5618 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:07,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:07,841 INFO L93 Difference]: Finished difference Result 1887 states and 6068 transitions. [2022-02-15 13:33:07,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:33:07,841 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:07,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:07,844 INFO L225 Difference]: With dead ends: 1887 [2022-02-15 13:33:07,844 INFO L226 Difference]: Without dead ends: 1853 [2022-02-15 13:33:07,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:33:07,845 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 74 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:07,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 337 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 638 Invalid, 0 Unknown, 266 Unchecked, 0.3s Time] [2022-02-15 13:33:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2022-02-15 13:33:07,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1721. [2022-02-15 13:33:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 3.2633720930232557) internal successors, (5613), 1720 states have internal predecessors, (5613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5613 transitions. [2022-02-15 13:33:07,864 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5613 transitions. Word has length 24 [2022-02-15 13:33:07,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:07,864 INFO L470 AbstractCegarLoop]: Abstraction has 1721 states and 5613 transitions. [2022-02-15 13:33:07,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:07,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5613 transitions. [2022-02-15 13:33:07,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:07,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:07,866 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:07,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:08,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:08,082 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:08,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:08,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1974379607, now seen corresponding path program 230 times [2022-02-15 13:33:08,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:08,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220914774] [2022-02-15 13:33:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:08,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:08,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:08,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220914774] [2022-02-15 13:33:08,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220914774] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:08,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512613483] [2022-02-15 13:33:08,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:33:08,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:08,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:08,285 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) [2022-02-15 13:33:08,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-02-15 13:33:08,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:33:08,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:08,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:08,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:08,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:08,391 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:33:08,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:08,498 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:33:08,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:08,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:33:08,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:08,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:09,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:09,178 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 102 treesize of output 96 [2022-02-15 13:33:09,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:09,342 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 146 treesize of output 126 [2022-02-15 13:33:09,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:09,347 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 118 treesize of output 98 [2022-02-15 13:33:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:09,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512613483] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:09,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:09,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:33:09,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309406017] [2022-02-15 13:33:09,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:09,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:33:09,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:09,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:33:09,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:33:09,454 INFO L87 Difference]: Start difference. First operand 1721 states and 5613 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) [2022-02-15 13:33:09,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:09,708 INFO L93 Difference]: Finished difference Result 1851 states and 5976 transitions. [2022-02-15 13:33:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:33:09,708 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 24 [2022-02-15 13:33:09,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:09,711 INFO L225 Difference]: With dead ends: 1851 [2022-02-15 13:33:09,711 INFO L226 Difference]: Without dead ends: 1785 [2022-02-15 13:33:09,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:09,711 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:09,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 193 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 597 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-02-15 13:33:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2022-02-15 13:33:09,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1723. [2022-02-15 13:33:09,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 3.264808362369338) internal successors, (5622), 1722 states have internal predecessors, (5622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 5622 transitions. [2022-02-15 13:33:09,729 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 5622 transitions. Word has length 24 [2022-02-15 13:33:09,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:09,730 INFO L470 AbstractCegarLoop]: Abstraction has 1723 states and 5622 transitions. [2022-02-15 13:33:09,730 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) [2022-02-15 13:33:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 5622 transitions. [2022-02-15 13:33:09,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:09,732 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:09,732 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:09,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:09,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-02-15 13:33:09,946 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:09,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:09,946 INFO L85 PathProgramCache]: Analyzing trace with hash -38685129, now seen corresponding path program 231 times [2022-02-15 13:33:09,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:09,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069945708] [2022-02-15 13:33:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:09,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:10,140 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:10,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069945708] [2022-02-15 13:33:10,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069945708] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:10,140 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568448417] [2022-02-15 13:33:10,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:33:10,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:10,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:10,141 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) [2022-02-15 13:33:10,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-02-15 13:33:10,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:33:10,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:10,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:33:10,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:10,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:10,301 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:33:10,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:10,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 53 [2022-02-15 13:33:10,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:10,495 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-02-15 13:33:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:10,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:11,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:11,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 123 [2022-02-15 13:33:11,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:11,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 94 [2022-02-15 13:33:11,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:11,378 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 86 treesize of output 74 [2022-02-15 13:33:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:11,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568448417] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:11,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:11,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:33:11,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845082558] [2022-02-15 13:33:11,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:11,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:33:11,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:11,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:33:11,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:33:11,453 INFO L87 Difference]: Start difference. First operand 1723 states and 5622 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:11,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:11,635 INFO L93 Difference]: Finished difference Result 1811 states and 5863 transitions. [2022-02-15 13:33:11,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:33:11,635 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:33:11,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:11,638 INFO L225 Difference]: With dead ends: 1811 [2022-02-15 13:33:11,638 INFO L226 Difference]: Without dead ends: 1772 [2022-02-15 13:33:11,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:11,638 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:11,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 318 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 519 Invalid, 0 Unknown, 258 Unchecked, 0.2s Time] [2022-02-15 13:33:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2022-02-15 13:33:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1723. [2022-02-15 13:33:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 3.264808362369338) internal successors, (5622), 1722 states have internal predecessors, (5622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:11,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 5622 transitions. [2022-02-15 13:33:11,657 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 5622 transitions. Word has length 24 [2022-02-15 13:33:11,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:11,657 INFO L470 AbstractCegarLoop]: Abstraction has 1723 states and 5622 transitions. [2022-02-15 13:33:11,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:11,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 5622 transitions. [2022-02-15 13:33:11,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:11,659 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:11,659 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:11,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:11,874 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,SelfDestructingSolverStorable246 [2022-02-15 13:33:11,875 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:11,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:11,875 INFO L85 PathProgramCache]: Analyzing trace with hash -2012036845, now seen corresponding path program 232 times [2022-02-15 13:33:11,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:11,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819731779] [2022-02-15 13:33:11,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:11,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:12,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:12,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819731779] [2022-02-15 13:33:12,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819731779] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:12,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764160816] [2022-02-15 13:33:12,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:33:12,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:12,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:12,091 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) [2022-02-15 13:33:12,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-02-15 13:33:12,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:33:12,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:12,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:33:12,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:12,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:12,218 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:33:12,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:12,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 36 [2022-02-15 13:33:12,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:12,302 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:33:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:12,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:13,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:13,208 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 133 treesize of output 123 [2022-02-15 13:33:13,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:13,461 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 115 treesize of output 101 [2022-02-15 13:33:13,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:13,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 79 [2022-02-15 13:33:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:13,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764160816] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:13,560 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:13,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:33:13,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557253817] [2022-02-15 13:33:13,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:13,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:33:13,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:13,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:33:13,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:33:13,561 INFO L87 Difference]: Start difference. First operand 1723 states and 5622 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) [2022-02-15 13:33:15,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:15,043 INFO L93 Difference]: Finished difference Result 2274 states and 7034 transitions. [2022-02-15 13:33:15,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 13:33:15,043 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 24 [2022-02-15 13:33:15,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:15,047 INFO L225 Difference]: With dead ends: 2274 [2022-02-15 13:33:15,047 INFO L226 Difference]: Without dead ends: 2101 [2022-02-15 13:33:15,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:33:15,048 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 224 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:15,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 204 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 659 Invalid, 0 Unknown, 95 Unchecked, 0.3s Time] [2022-02-15 13:33:15,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2022-02-15 13:33:15,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 1723. [2022-02-15 13:33:15,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1722 states have (on average 3.264808362369338) internal successors, (5622), 1722 states have internal predecessors, (5622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 5622 transitions. [2022-02-15 13:33:15,071 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 5622 transitions. Word has length 24 [2022-02-15 13:33:15,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:15,072 INFO L470 AbstractCegarLoop]: Abstraction has 1723 states and 5622 transitions. [2022-02-15 13:33:15,072 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) [2022-02-15 13:33:15,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 5622 transitions. [2022-02-15 13:33:15,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:15,074 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:15,074 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:15,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:15,291 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,SelfDestructingSolverStorable247 [2022-02-15 13:33:15,291 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:15,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:15,291 INFO L85 PathProgramCache]: Analyzing trace with hash 249963507, now seen corresponding path program 233 times [2022-02-15 13:33:15,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:15,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118812233] [2022-02-15 13:33:15,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:15,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:15,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:15,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118812233] [2022-02-15 13:33:15,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118812233] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:15,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857316329] [2022-02-15 13:33:15,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:33:15,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:15,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:15,521 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) [2022-02-15 13:33:15,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-02-15 13:33:15,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:33:15,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:15,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:15,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:15,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:15,612 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:33:15,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:15,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:33:15,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:15,717 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:33:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:15,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:16,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:16,069 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 100 treesize of output 94 [2022-02-15 13:33:16,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:16,232 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 144 treesize of output 124 [2022-02-15 13:33:16,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:16,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 96 [2022-02-15 13:33:16,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:16,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857316329] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:16,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:16,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:16,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965645839] [2022-02-15 13:33:16,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:16,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:16,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:16,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:16,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:16,316 INFO L87 Difference]: Start difference. First operand 1723 states and 5622 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:16,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:16,634 INFO L93 Difference]: Finished difference Result 1811 states and 5861 transitions. [2022-02-15 13:33:16,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:33:16,635 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:16,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:16,638 INFO L225 Difference]: With dead ends: 1811 [2022-02-15 13:33:16,638 INFO L226 Difference]: Without dead ends: 1772 [2022-02-15 13:33:16,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:33:16,638 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:16,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 256 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 602 Invalid, 0 Unknown, 307 Unchecked, 0.2s Time] [2022-02-15 13:33:16,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2022-02-15 13:33:16,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1725. [2022-02-15 13:33:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 3.2639211136890953) internal successors, (5627), 1724 states have internal predecessors, (5627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:16,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 5627 transitions. [2022-02-15 13:33:16,658 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 5627 transitions. Word has length 24 [2022-02-15 13:33:16,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:16,658 INFO L470 AbstractCegarLoop]: Abstraction has 1725 states and 5627 transitions. [2022-02-15 13:33:16,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:16,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 5627 transitions. [2022-02-15 13:33:16,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:16,660 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:16,660 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:16,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:16,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:16,863 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:16,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:16,864 INFO L85 PathProgramCache]: Analyzing trace with hash -848461897, now seen corresponding path program 234 times [2022-02-15 13:33:16,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:16,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999898796] [2022-02-15 13:33:16,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:16,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:17,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:17,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999898796] [2022-02-15 13:33:17,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999898796] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:17,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425358145] [2022-02-15 13:33:17,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:33:17,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:17,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:17,125 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) [2022-02-15 13:33:17,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-02-15 13:33:17,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:33:17,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:17,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:33:17,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:17,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:17,238 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:33:17,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:17,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-15 13:33:17,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:17,347 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:33:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:17,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:18,007 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:18,008 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 133 treesize of output 123 [2022-02-15 13:33:18,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:18,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 99 [2022-02-15 13:33:18,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:18,241 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 91 treesize of output 77 [2022-02-15 13:33:18,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:18,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425358145] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:18,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:18,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:18,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284435247] [2022-02-15 13:33:18,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:18,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:18,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:18,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:18,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:18,330 INFO L87 Difference]: Start difference. First operand 1725 states and 5627 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:19,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:19,117 INFO L93 Difference]: Finished difference Result 1902 states and 6063 transitions. [2022-02-15 13:33:19,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:33:19,117 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:19,121 INFO L225 Difference]: With dead ends: 1902 [2022-02-15 13:33:19,121 INFO L226 Difference]: Without dead ends: 1820 [2022-02-15 13:33:19,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:33:19,121 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 83 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:19,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 202 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 647 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-02-15 13:33:19,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2022-02-15 13:33:19,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1725. [2022-02-15 13:33:19,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 3.2639211136890953) internal successors, (5627), 1724 states have internal predecessors, (5627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 5627 transitions. [2022-02-15 13:33:19,155 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 5627 transitions. Word has length 24 [2022-02-15 13:33:19,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:19,155 INFO L470 AbstractCegarLoop]: Abstraction has 1725 states and 5627 transitions. [2022-02-15 13:33:19,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:19,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 5627 transitions. [2022-02-15 13:33:19,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:19,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:19,158 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:19,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-02-15 13:33:19,369 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,SelfDestructingSolverStorable249 [2022-02-15 13:33:19,369 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:19,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:19,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1606762527, now seen corresponding path program 235 times [2022-02-15 13:33:19,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:19,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164173809] [2022-02-15 13:33:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:19,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:19,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:19,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164173809] [2022-02-15 13:33:19,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164173809] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:19,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044743079] [2022-02-15 13:33:19,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:33:19,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:19,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:19,573 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) [2022-02-15 13:33:19,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-02-15 13:33:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:19,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:33:19,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:19,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:33:19,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:19,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 37 [2022-02-15 13:33:19,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:19,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:33:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:19,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:20,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:20,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-15 13:33:20,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:20,471 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 109 treesize of output 97 [2022-02-15 13:33:20,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:20,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 77 [2022-02-15 13:33:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:20,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044743079] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:20,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:20,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:20,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602374580] [2022-02-15 13:33:20,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:20,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:20,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:20,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:20,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:20,549 INFO L87 Difference]: Start difference. First operand 1725 states and 5627 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:21,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:21,507 INFO L93 Difference]: Finished difference Result 2332 states and 7257 transitions. [2022-02-15 13:33:21,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:33:21,507 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:21,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:21,511 INFO L225 Difference]: With dead ends: 2332 [2022-02-15 13:33:21,511 INFO L226 Difference]: Without dead ends: 2190 [2022-02-15 13:33:21,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:33:21,511 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 177 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:21,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 306 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 992 Invalid, 0 Unknown, 23 Unchecked, 0.3s Time] [2022-02-15 13:33:21,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2022-02-15 13:33:21,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1735. [2022-02-15 13:33:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1735 states, 1734 states have (on average 3.2635524798154556) internal successors, (5659), 1734 states have internal predecessors, (5659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:21,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1735 states to 1735 states and 5659 transitions. [2022-02-15 13:33:21,534 INFO L78 Accepts]: Start accepts. Automaton has 1735 states and 5659 transitions. Word has length 24 [2022-02-15 13:33:21,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:21,534 INFO L470 AbstractCegarLoop]: Abstraction has 1735 states and 5659 transitions. [2022-02-15 13:33:21,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:21,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1735 states and 5659 transitions. [2022-02-15 13:33:21,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:21,536 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:21,536 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:21,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:21,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:21,752 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:21,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2115280005, now seen corresponding path program 236 times [2022-02-15 13:33:21,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:21,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212176694] [2022-02-15 13:33:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:21,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:21,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:21,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212176694] [2022-02-15 13:33:21,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212176694] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:21,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198669588] [2022-02-15 13:33:21,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:33:21,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:21,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:21,898 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) [2022-02-15 13:33:21,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-02-15 13:33:21,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:33:21,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:21,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:21,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:21,982 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 41 treesize of output 35 [2022-02-15 13:33:22,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:22,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:33:22,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:22,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:33:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:22,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:22,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:22,513 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 102 treesize of output 96 [2022-02-15 13:33:22,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:22,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 126 [2022-02-15 13:33:22,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:22,621 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 118 treesize of output 98 [2022-02-15 13:33:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:22,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198669588] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:22,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:22,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:33:22,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783266708] [2022-02-15 13:33:22,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:22,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:33:22,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:22,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:33:22,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:33:22,690 INFO L87 Difference]: Start difference. First operand 1735 states and 5659 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:22,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:22,899 INFO L93 Difference]: Finished difference Result 1866 states and 6012 transitions. [2022-02-15 13:33:22,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:33:22,899 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:33:22,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:22,902 INFO L225 Difference]: With dead ends: 1866 [2022-02-15 13:33:22,902 INFO L226 Difference]: Without dead ends: 1804 [2022-02-15 13:33:22,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:22,902 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:22,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 188 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 592 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time] [2022-02-15 13:33:22,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2022-02-15 13:33:22,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1730. [2022-02-15 13:33:22,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1730 states, 1729 states have (on average 3.2643146327356853) internal successors, (5644), 1729 states have internal predecessors, (5644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 5644 transitions. [2022-02-15 13:33:22,921 INFO L78 Accepts]: Start accepts. Automaton has 1730 states and 5644 transitions. Word has length 24 [2022-02-15 13:33:22,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:22,921 INFO L470 AbstractCegarLoop]: Abstraction has 1730 states and 5644 transitions. [2022-02-15 13:33:22,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:22,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1730 states and 5644 transitions. [2022-02-15 13:33:22,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:22,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:22,923 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:22,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:23,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:23,139 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:23,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:23,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1722283241, now seen corresponding path program 237 times [2022-02-15 13:33:23,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:23,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073461884] [2022-02-15 13:33:23,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:23,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:23,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:23,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073461884] [2022-02-15 13:33:23,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073461884] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:23,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868241925] [2022-02-15 13:33:23,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:33:23,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:23,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:23,281 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) [2022-02-15 13:33:23,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-02-15 13:33:23,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:33:23,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:23,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:23,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:23,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:23,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:33:23,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:23,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:33:23,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:23,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 12 treesize of output 3 [2022-02-15 13:33:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:23,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:24,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:24,019 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 102 treesize of output 96 [2022-02-15 13:33:24,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:24,140 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 146 treesize of output 126 [2022-02-15 13:33:24,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:24,145 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 118 treesize of output 98 [2022-02-15 13:33:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:24,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868241925] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:24,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:24,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:33:24,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357657238] [2022-02-15 13:33:24,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:24,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:33:24,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:24,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:33:24,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:33:24,238 INFO L87 Difference]: Start difference. First operand 1730 states and 5644 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) [2022-02-15 13:33:24,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:24,401 INFO L93 Difference]: Finished difference Result 1866 states and 6049 transitions. [2022-02-15 13:33:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:33:24,401 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 24 [2022-02-15 13:33:24,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:24,404 INFO L225 Difference]: With dead ends: 1866 [2022-02-15 13:33:24,404 INFO L226 Difference]: Without dead ends: 1808 [2022-02-15 13:33:24,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:33:24,417 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 63 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:24,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 113 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 397 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-02-15 13:33:24,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2022-02-15 13:33:24,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1737. [2022-02-15 13:33:24,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1737 states, 1736 states have (on average 3.2672811059907834) internal successors, (5672), 1736 states have internal predecessors, (5672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:24,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 5672 transitions. [2022-02-15 13:33:24,438 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 5672 transitions. Word has length 24 [2022-02-15 13:33:24,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:24,438 INFO L470 AbstractCegarLoop]: Abstraction has 1737 states and 5672 transitions. [2022-02-15 13:33:24,438 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) [2022-02-15 13:33:24,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 5672 transitions. [2022-02-15 13:33:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:24,440 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:24,440 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:24,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:24,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:24,656 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:24,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:24,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1024119881, now seen corresponding path program 238 times [2022-02-15 13:33:24,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:24,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701334163] [2022-02-15 13:33:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:24,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:24,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:24,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701334163] [2022-02-15 13:33:24,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701334163] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:24,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734228002] [2022-02-15 13:33:24,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:33:24,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:24,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:24,813 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) [2022-02-15 13:33:24,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-02-15 13:33:24,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:33:24,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:24,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:33:24,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:24,897 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 41 treesize of output 35 [2022-02-15 13:33:25,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:25,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 23 [2022-02-15 13:33:25,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:25,075 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-15 13:33:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:25,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:25,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:25,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 74 [2022-02-15 13:33:25,619 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:25,619 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 114 treesize of output 100 [2022-02-15 13:33:25,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:25,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 78 [2022-02-15 13:33:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:25,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734228002] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:25,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:25,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:25,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229186710] [2022-02-15 13:33:25,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:25,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:25,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:25,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:25,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:25,758 INFO L87 Difference]: Start difference. First operand 1737 states and 5672 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:26,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:26,087 INFO L93 Difference]: Finished difference Result 1924 states and 6151 transitions. [2022-02-15 13:33:26,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:33:26,088 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:26,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:26,090 INFO L225 Difference]: With dead ends: 1924 [2022-02-15 13:33:26,091 INFO L226 Difference]: Without dead ends: 1847 [2022-02-15 13:33:26,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:33:26,091 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:26,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 239 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 548 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-02-15 13:33:26,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2022-02-15 13:33:26,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1771. [2022-02-15 13:33:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1771 states, 1770 states have (on average 3.2531073446327685) internal successors, (5758), 1770 states have internal predecessors, (5758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:26,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1771 states to 1771 states and 5758 transitions. [2022-02-15 13:33:26,110 INFO L78 Accepts]: Start accepts. Automaton has 1771 states and 5758 transitions. Word has length 24 [2022-02-15 13:33:26,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:26,110 INFO L470 AbstractCegarLoop]: Abstraction has 1771 states and 5758 transitions. [2022-02-15 13:33:26,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:26,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1771 states and 5758 transitions. [2022-02-15 13:33:26,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:26,112 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:26,112 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:26,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:26,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:26,327 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:26,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:26,328 INFO L85 PathProgramCache]: Analyzing trace with hash 881341979, now seen corresponding path program 239 times [2022-02-15 13:33:26,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:26,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200157407] [2022-02-15 13:33:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:26,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:26,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:26,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:26,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200157407] [2022-02-15 13:33:26,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200157407] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:26,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021094188] [2022-02-15 13:33:26,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:33:26,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:26,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:26,495 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) [2022-02-15 13:33:26,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-02-15 13:33:26,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:33:26,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:26,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:26,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:26,583 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 41 treesize of output 35 [2022-02-15 13:33:26,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:26,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:33:26,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:26,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:33:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:26,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:27,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:27,218 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 76 treesize of output 72 [2022-02-15 13:33:27,294 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:27,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 73 [2022-02-15 13:33:27,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:27,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-02-15 13:33:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:27,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021094188] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:27,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:27,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:27,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554161662] [2022-02-15 13:33:27,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:27,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:27,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:27,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:27,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:27,399 INFO L87 Difference]: Start difference. First operand 1771 states and 5758 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:27,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:27,712 INFO L93 Difference]: Finished difference Result 1828 states and 5905 transitions. [2022-02-15 13:33:27,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:33:27,713 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:27,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:27,716 INFO L225 Difference]: With dead ends: 1828 [2022-02-15 13:33:27,716 INFO L226 Difference]: Without dead ends: 1825 [2022-02-15 13:33:27,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:33:27,716 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 60 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:27,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 162 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 469 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2022-02-15 13:33:27,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2022-02-15 13:33:27,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1751. [2022-02-15 13:33:27,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 3.261142857142857) internal successors, (5707), 1750 states have internal predecessors, (5707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:27,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 5707 transitions. [2022-02-15 13:33:27,759 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 5707 transitions. Word has length 24 [2022-02-15 13:33:27,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:27,759 INFO L470 AbstractCegarLoop]: Abstraction has 1751 states and 5707 transitions. [2022-02-15 13:33:27,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:27,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 5707 transitions. [2022-02-15 13:33:27,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:27,766 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:27,766 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:27,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:27,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:27,984 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:27,992 INFO L85 PathProgramCache]: Analyzing trace with hash -161016863, now seen corresponding path program 240 times [2022-02-15 13:33:27,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:27,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530654951] [2022-02-15 13:33:27,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:27,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:33:28,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:28,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530654951] [2022-02-15 13:33:28,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530654951] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:28,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444890149] [2022-02-15 13:33:28,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:33:28,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:28,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:28,102 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) [2022-02-15 13:33:28,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-02-15 13:33:28,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:33:28,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:28,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:33:28,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:28,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:33:28,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:28,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 23 [2022-02-15 13:33:28,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:28,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-02-15 13:33:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:33:28,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:28,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:28,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 74 [2022-02-15 13:33:28,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:28,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 100 [2022-02-15 13:33:28,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:28,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 78 [2022-02-15 13:33:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:33:28,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444890149] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:28,846 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:28,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:33:28,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900537021] [2022-02-15 13:33:28,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:28,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:33:28,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:28,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:33:28,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:33:28,847 INFO L87 Difference]: Start difference. First operand 1751 states and 5707 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:29,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:29,294 INFO L93 Difference]: Finished difference Result 2050 states and 6491 transitions. [2022-02-15 13:33:29,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:33:29,296 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:33:29,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:29,299 INFO L225 Difference]: With dead ends: 2050 [2022-02-15 13:33:29,299 INFO L226 Difference]: Without dead ends: 1947 [2022-02-15 13:33:29,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:33:29,299 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:29,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 278 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:33:29,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2022-02-15 13:33:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1745. [2022-02-15 13:33:29,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1744 states have (on average 3.2666284403669725) internal successors, (5697), 1744 states have internal predecessors, (5697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 5697 transitions. [2022-02-15 13:33:29,320 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 5697 transitions. Word has length 24 [2022-02-15 13:33:29,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:29,320 INFO L470 AbstractCegarLoop]: Abstraction has 1745 states and 5697 transitions. [2022-02-15 13:33:29,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:29,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 5697 transitions. [2022-02-15 13:33:29,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:29,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:29,322 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:29,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:29,525 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,SelfDestructingSolverStorable255 [2022-02-15 13:33:29,525 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:29,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:29,526 INFO L85 PathProgramCache]: Analyzing trace with hash 539717111, now seen corresponding path program 241 times [2022-02-15 13:33:29,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:29,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772845154] [2022-02-15 13:33:29,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:29,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:29,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:29,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:29,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772845154] [2022-02-15 13:33:29,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772845154] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:29,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26727903] [2022-02-15 13:33:29,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:33:29,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:29,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:29,720 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) [2022-02-15 13:33:29,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-02-15 13:33:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:29,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:33:29,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:29,835 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 41 treesize of output 35 [2022-02-15 13:33:29,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:29,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 37 [2022-02-15 13:33:30,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:30,002 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:33:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:30,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:30,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:30,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 74 [2022-02-15 13:33:30,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:30,744 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 122 treesize of output 108 [2022-02-15 13:33:30,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:30,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 86 [2022-02-15 13:33:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:30,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26727903] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:30,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:30,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:30,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897774278] [2022-02-15 13:33:30,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:30,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:30,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:30,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:30,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:30,838 INFO L87 Difference]: Start difference. First operand 1745 states and 5697 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:31,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:31,578 INFO L93 Difference]: Finished difference Result 2032 states and 6388 transitions. [2022-02-15 13:33:31,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:33:31,579 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:31,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:31,582 INFO L225 Difference]: With dead ends: 2032 [2022-02-15 13:33:31,582 INFO L226 Difference]: Without dead ends: 1903 [2022-02-15 13:33:31,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:33:31,583 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 101 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:31,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 342 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 754 Invalid, 0 Unknown, 58 Unchecked, 0.3s Time] [2022-02-15 13:33:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2022-02-15 13:33:31,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1751. [2022-02-15 13:33:31,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1751 states, 1750 states have (on average 3.264) internal successors, (5712), 1750 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:31,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 5712 transitions. [2022-02-15 13:33:31,603 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 5712 transitions. Word has length 24 [2022-02-15 13:33:31,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:31,603 INFO L470 AbstractCegarLoop]: Abstraction has 1751 states and 5712 transitions. [2022-02-15 13:33:31,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 5712 transitions. [2022-02-15 13:33:31,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:31,606 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:31,606 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:31,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:31,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-02-15 13:33:31,806 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:31,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:31,807 INFO L85 PathProgramCache]: Analyzing trace with hash -479321271, now seen corresponding path program 242 times [2022-02-15 13:33:31,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:31,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400486433] [2022-02-15 13:33:31,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:31,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:32,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:32,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400486433] [2022-02-15 13:33:32,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400486433] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:32,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123602128] [2022-02-15 13:33:32,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:33:32,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:32,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:32,011 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) [2022-02-15 13:33:32,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-02-15 13:33:32,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:33:32,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:32,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:32,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:32,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:32,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-02-15 13:33:32,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:32,286 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:33:32,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:32,289 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:33:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:32,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:32,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:32,714 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 77 treesize of output 75 [2022-02-15 13:33:32,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:32,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 127 [2022-02-15 13:33:32,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:32,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 99 [2022-02-15 13:33:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:33,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123602128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:33,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:33,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:33,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027920361] [2022-02-15 13:33:33,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:33,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:33,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:33,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:33,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:33,049 INFO L87 Difference]: Start difference. First operand 1751 states and 5712 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:33,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:33,434 INFO L93 Difference]: Finished difference Result 1839 states and 5951 transitions. [2022-02-15 13:33:33,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:33:33,434 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:33,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:33,437 INFO L225 Difference]: With dead ends: 1839 [2022-02-15 13:33:33,437 INFO L226 Difference]: Without dead ends: 1800 [2022-02-15 13:33:33,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:33:33,437 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:33,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 259 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 717 Invalid, 0 Unknown, 148 Unchecked, 0.3s Time] [2022-02-15 13:33:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2022-02-15 13:33:33,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1753. [2022-02-15 13:33:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 3.2631278538812785) internal successors, (5717), 1752 states have internal predecessors, (5717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:33,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 5717 transitions. [2022-02-15 13:33:33,458 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 5717 transitions. Word has length 24 [2022-02-15 13:33:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:33,458 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 5717 transitions. [2022-02-15 13:33:33,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 5717 transitions. [2022-02-15 13:33:33,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:33,460 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:33,460 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:33,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-02-15 13:33:33,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-02-15 13:33:33,676 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:33,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:33,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1577746675, now seen corresponding path program 243 times [2022-02-15 13:33:33,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:33,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326183486] [2022-02-15 13:33:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:33,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:33,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:33,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326183486] [2022-02-15 13:33:33,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326183486] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:33,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903511492] [2022-02-15 13:33:33,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:33:33,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:33,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:33,890 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) [2022-02-15 13:33:33,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-02-15 13:33:33,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 13:33:33,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:33,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:33,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:34,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:34,043 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-02-15 13:33:34,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:34,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-15 13:33:34,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:34,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:33:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:34,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:34,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:34,499 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 77 treesize of output 75 [2022-02-15 13:33:34,712 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:34,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 127 [2022-02-15 13:33:34,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:34,717 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 119 treesize of output 99 [2022-02-15 13:33:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:34,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903511492] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:34,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:34,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:34,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126696487] [2022-02-15 13:33:34,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:34,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:34,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:34,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:34,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:34,815 INFO L87 Difference]: Start difference. First operand 1753 states and 5717 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:35,252 INFO L93 Difference]: Finished difference Result 1845 states and 5964 transitions. [2022-02-15 13:33:35,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:33:35,252 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:35,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:35,255 INFO L225 Difference]: With dead ends: 1845 [2022-02-15 13:33:35,255 INFO L226 Difference]: Without dead ends: 1810 [2022-02-15 13:33:35,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:33:35,256 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 59 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:35,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 245 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 722 Invalid, 0 Unknown, 143 Unchecked, 0.3s Time] [2022-02-15 13:33:35,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2022-02-15 13:33:35,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1749. [2022-02-15 13:33:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.26487414187643) internal successors, (5707), 1748 states have internal predecessors, (5707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 5707 transitions. [2022-02-15 13:33:35,276 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 5707 transitions. Word has length 24 [2022-02-15 13:33:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:35,276 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 5707 transitions. [2022-02-15 13:33:35,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 5707 transitions. [2022-02-15 13:33:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:35,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:35,278 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:35,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:35,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:35,491 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:35,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:35,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2095155597, now seen corresponding path program 244 times [2022-02-15 13:33:35,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:35,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538537163] [2022-02-15 13:33:35,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:35,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:35,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:35,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538537163] [2022-02-15 13:33:35,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538537163] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:35,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543480767] [2022-02-15 13:33:35,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:33:35,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:35,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:35,607 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) [2022-02-15 13:33:35,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-02-15 13:33:35,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:33:35,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:35,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:33:35,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:35,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:35,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:33:35,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:35,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:33:35,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:35,859 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:33:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:35,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:36,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:36,241 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 111 treesize of output 97 [2022-02-15 13:33:36,375 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:36,375 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 35 treesize of output 37 [2022-02-15 13:33:36,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:36,378 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 29 treesize of output 31 [2022-02-15 13:33:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:36,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543480767] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:36,394 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:36,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:36,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125358845] [2022-02-15 13:33:36,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:36,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:36,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:36,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:36,395 INFO L87 Difference]: Start difference. First operand 1749 states and 5707 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:36,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:36,658 INFO L93 Difference]: Finished difference Result 1862 states and 6019 transitions. [2022-02-15 13:33:36,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:33:36,658 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:36,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:36,661 INFO L225 Difference]: With dead ends: 1862 [2022-02-15 13:33:36,661 INFO L226 Difference]: Without dead ends: 1803 [2022-02-15 13:33:36,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:33:36,661 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 65 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:36,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 228 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 619 Invalid, 0 Unknown, 247 Unchecked, 0.2s Time] [2022-02-15 13:33:36,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2022-02-15 13:33:36,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1753. [2022-02-15 13:33:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1752 states have (on average 3.2648401826484017) internal successors, (5720), 1752 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:36,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 5720 transitions. [2022-02-15 13:33:36,680 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 5720 transitions. Word has length 24 [2022-02-15 13:33:36,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:36,680 INFO L470 AbstractCegarLoop]: Abstraction has 1753 states and 5720 transitions. [2022-02-15 13:33:36,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:36,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 5720 transitions. [2022-02-15 13:33:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:36,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:36,682 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:36,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:36,898 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,SelfDestructingSolverStorable259 [2022-02-15 13:33:36,898 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:36,898 INFO L85 PathProgramCache]: Analyzing trace with hash -931222423, now seen corresponding path program 245 times [2022-02-15 13:33:36,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:36,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517745751] [2022-02-15 13:33:36,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:36,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:37,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:37,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517745751] [2022-02-15 13:33:37,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517745751] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:37,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981611677] [2022-02-15 13:33:37,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:33:37,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:37,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:37,014 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) [2022-02-15 13:33:37,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-02-15 13:33:37,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:33:37,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:37,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:37,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:37,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:37,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:33:37,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:37,198 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:33:37,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:37,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:33:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:37,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:37,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:37,720 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 83 treesize of output 74 [2022-02-15 13:33:37,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:37,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:33:37,799 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:37,799 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 25 treesize of output 27 [2022-02-15 13:33:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:37,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981611677] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:37,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:37,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:33:37,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355572857] [2022-02-15 13:33:37,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:37,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:33:37,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:37,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:33:37,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:33:37,812 INFO L87 Difference]: Start difference. First operand 1753 states and 5720 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) [2022-02-15 13:33:38,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:38,358 INFO L93 Difference]: Finished difference Result 2067 states and 6473 transitions. [2022-02-15 13:33:38,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:33:38,358 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 24 [2022-02-15 13:33:38,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:38,362 INFO L225 Difference]: With dead ends: 2067 [2022-02-15 13:33:38,362 INFO L226 Difference]: Without dead ends: 1956 [2022-02-15 13:33:38,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:33:38,362 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 147 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:38,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 267 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 699 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-02-15 13:33:38,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2022-02-15 13:33:38,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1756. [2022-02-15 13:33:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1755 states have (on average 3.264957264957265) internal successors, (5730), 1755 states have internal predecessors, (5730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:38,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 5730 transitions. [2022-02-15 13:33:38,383 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 5730 transitions. Word has length 24 [2022-02-15 13:33:38,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:38,383 INFO L470 AbstractCegarLoop]: Abstraction has 1756 states and 5730 transitions. [2022-02-15 13:33:38,383 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) [2022-02-15 13:33:38,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 5730 transitions. [2022-02-15 13:33:38,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:38,385 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:38,385 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:38,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:38,601 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,SelfDestructingSolverStorable260 [2022-02-15 13:33:38,601 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:38,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:38,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1786604753, now seen corresponding path program 246 times [2022-02-15 13:33:38,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:38,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463413002] [2022-02-15 13:33:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:38,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:38,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:38,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463413002] [2022-02-15 13:33:38,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463413002] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:38,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610488705] [2022-02-15 13:33:38,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:33:38,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:38,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:38,794 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) [2022-02-15 13:33:38,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-02-15 13:33:38,821 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:33:38,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:38,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:38,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:38,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:33:38,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-15 13:33:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:38,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:39,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:39,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-02-15 13:33:39,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:39,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:33:39,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:39,371 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 25 treesize of output 27 [2022-02-15 13:33:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:39,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610488705] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:39,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:39,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:39,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470483835] [2022-02-15 13:33:39,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:39,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:39,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:39,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:39,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:39,403 INFO L87 Difference]: Start difference. First operand 1756 states and 5730 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:39,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:39,980 INFO L93 Difference]: Finished difference Result 2148 states and 6855 transitions. [2022-02-15 13:33:39,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:33:39,980 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:39,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:39,983 INFO L225 Difference]: With dead ends: 2148 [2022-02-15 13:33:39,983 INFO L226 Difference]: Without dead ends: 2035 [2022-02-15 13:33:39,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:33:39,984 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 133 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:39,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 232 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:33:39,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-02-15 13:33:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1772. [2022-02-15 13:33:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1772 states, 1771 states have (on average 3.2648221343873516) internal successors, (5782), 1771 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:40,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1772 states to 1772 states and 5782 transitions. [2022-02-15 13:33:40,004 INFO L78 Accepts]: Start accepts. Automaton has 1772 states and 5782 transitions. Word has length 24 [2022-02-15 13:33:40,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:40,004 INFO L470 AbstractCegarLoop]: Abstraction has 1772 states and 5782 transitions. [2022-02-15 13:33:40,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:40,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1772 states and 5782 transitions. [2022-02-15 13:33:40,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:40,007 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:40,007 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:40,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-02-15 13:33:40,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:40,219 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:40,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:40,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2005835981, now seen corresponding path program 247 times [2022-02-15 13:33:40,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:40,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511203097] [2022-02-15 13:33:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:40,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:40,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:40,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511203097] [2022-02-15 13:33:40,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511203097] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:40,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601207287] [2022-02-15 13:33:40,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:33:40,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:40,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:40,337 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) [2022-02-15 13:33:40,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-02-15 13:33:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:40,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:40,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:40,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:40,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:33:40,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:40,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 22 [2022-02-15 13:33:40,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:40,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:33:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:40,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:41,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:41,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:33:41,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:41,221 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 31 treesize of output 33 [2022-02-15 13:33:41,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:41,223 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 25 treesize of output 27 [2022-02-15 13:33:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:41,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601207287] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:41,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:41,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:33:41,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997069640] [2022-02-15 13:33:41,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:41,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:33:41,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:41,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:33:41,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:33:41,237 INFO L87 Difference]: Start difference. First operand 1772 states and 5782 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2022-02-15 13:33:41,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:41,373 INFO L93 Difference]: Finished difference Result 1863 states and 6038 transitions. [2022-02-15 13:33:41,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:33:41,374 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 24 [2022-02-15 13:33:41,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:41,376 INFO L225 Difference]: With dead ends: 1863 [2022-02-15 13:33:41,376 INFO L226 Difference]: Without dead ends: 1832 [2022-02-15 13:33:41,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:41,377 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:41,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 156 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 339 Invalid, 0 Unknown, 224 Unchecked, 0.1s Time] [2022-02-15 13:33:41,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2022-02-15 13:33:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1768. [2022-02-15 13:33:41,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1768 states, 1767 states have (on average 3.264855687606112) internal successors, (5769), 1767 states have internal predecessors, (5769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:41,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 5769 transitions. [2022-02-15 13:33:41,396 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 5769 transitions. Word has length 24 [2022-02-15 13:33:41,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:41,396 INFO L470 AbstractCegarLoop]: Abstraction has 1768 states and 5769 transitions. [2022-02-15 13:33:41,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2022-02-15 13:33:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 5769 transitions. [2022-02-15 13:33:41,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:41,398 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:41,398 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:41,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:41,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:41,614 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:41,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:41,614 INFO L85 PathProgramCache]: Analyzing trace with hash -647549339, now seen corresponding path program 248 times [2022-02-15 13:33:41,614 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:41,614 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110165818] [2022-02-15 13:33:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:41,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:41,734 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:41,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:41,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110165818] [2022-02-15 13:33:41,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110165818] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:41,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210262700] [2022-02-15 13:33:41,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:33:41,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:41,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:41,737 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) [2022-02-15 13:33:41,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-02-15 13:33:41,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:33:41,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:41,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:41,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:41,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:41,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:33:41,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:41,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 41 [2022-02-15 13:33:41,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:41,876 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:33:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:42,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:42,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:42,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-02-15 13:33:42,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:42,574 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 31 treesize of output 33 [2022-02-15 13:33:42,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:42,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:33:42,589 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:42,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210262700] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:42,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:42,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:42,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419296923] [2022-02-15 13:33:42,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:42,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:42,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:42,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:42,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:42,590 INFO L87 Difference]: Start difference. First operand 1768 states and 5769 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:43,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:43,393 INFO L93 Difference]: Finished difference Result 2138 states and 6669 transitions. [2022-02-15 13:33:43,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:33:43,393 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:43,396 INFO L225 Difference]: With dead ends: 2138 [2022-02-15 13:33:43,396 INFO L226 Difference]: Without dead ends: 2027 [2022-02-15 13:33:43,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:33:43,397 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 224 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:43,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 291 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 785 Invalid, 0 Unknown, 113 Unchecked, 0.3s Time] [2022-02-15 13:33:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2022-02-15 13:33:43,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1789. [2022-02-15 13:33:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1789 states, 1788 states have (on average 3.2656599552572705) internal successors, (5839), 1788 states have internal predecessors, (5839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:43,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1789 states to 1789 states and 5839 transitions. [2022-02-15 13:33:43,418 INFO L78 Accepts]: Start accepts. Automaton has 1789 states and 5839 transitions. Word has length 24 [2022-02-15 13:33:43,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:43,418 INFO L470 AbstractCegarLoop]: Abstraction has 1789 states and 5839 transitions. [2022-02-15 13:33:43,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:43,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1789 states and 5839 transitions. [2022-02-15 13:33:43,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:43,420 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:43,420 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:43,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:43,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:43,636 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:43,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:43,636 INFO L85 PathProgramCache]: Analyzing trace with hash 843380829, now seen corresponding path program 249 times [2022-02-15 13:33:43,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:43,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090920134] [2022-02-15 13:33:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:43,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:43,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:43,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:43,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090920134] [2022-02-15 13:33:43,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090920134] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:43,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230651640] [2022-02-15 13:33:43,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:33:43,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:43,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:43,742 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) [2022-02-15 13:33:43,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-02-15 13:33:43,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:33:43,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:43,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:33:43,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:43,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:43,859 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:33:43,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:43,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:33:43,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:43,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-02-15 13:33:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:43,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:44,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:44,315 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 111 treesize of output 97 [2022-02-15 13:33:44,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:44,495 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 35 treesize of output 37 [2022-02-15 13:33:44,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:44,499 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 29 treesize of output 31 [2022-02-15 13:33:44,520 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:44,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230651640] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:44,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:44,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:44,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125573281] [2022-02-15 13:33:44,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:44,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:44,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:44,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:44,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:44,521 INFO L87 Difference]: Start difference. First operand 1789 states and 5839 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:44,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:44,754 INFO L93 Difference]: Finished difference Result 1935 states and 6229 transitions. [2022-02-15 13:33:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:33:44,754 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:44,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:44,757 INFO L225 Difference]: With dead ends: 1935 [2022-02-15 13:33:44,757 INFO L226 Difference]: Without dead ends: 1852 [2022-02-15 13:33:44,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:33:44,757 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 67 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:44,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 197 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 430 Invalid, 0 Unknown, 337 Unchecked, 0.2s Time] [2022-02-15 13:33:44,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2022-02-15 13:33:44,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1800. [2022-02-15 13:33:44,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1799 states have (on average 3.264591439688716) internal successors, (5873), 1799 states have internal predecessors, (5873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:44,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 5873 transitions. [2022-02-15 13:33:44,776 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 5873 transitions. Word has length 24 [2022-02-15 13:33:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:44,776 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 5873 transitions. [2022-02-15 13:33:44,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:44,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 5873 transitions. [2022-02-15 13:33:44,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:44,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:44,779 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:44,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:44,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:44,994 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:44,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1600561663, now seen corresponding path program 250 times [2022-02-15 13:33:44,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:44,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54373478] [2022-02-15 13:33:44,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:44,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:45,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:45,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54373478] [2022-02-15 13:33:45,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54373478] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:45,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752681288] [2022-02-15 13:33:45,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:33:45,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:45,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:45,108 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) [2022-02-15 13:33:45,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-02-15 13:33:45,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:33:45,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:45,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:33:45,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:45,187 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 26 treesize of output 20 [2022-02-15 13:33:45,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:33:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:45,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:45,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:45,735 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 113 treesize of output 99 [2022-02-15 13:33:45,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:45,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:33:45,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:45,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:33:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:45,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752681288] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:45,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:45,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:33:45,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513953118] [2022-02-15 13:33:45,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:45,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:33:45,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:45,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:33:45,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:33:45,901 INFO L87 Difference]: Start difference. First operand 1800 states and 5873 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2022-02-15 13:33:46,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:46,781 INFO L93 Difference]: Finished difference Result 2493 states and 7742 transitions. [2022-02-15 13:33:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:33:46,781 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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 24 [2022-02-15 13:33:46,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:46,786 INFO L225 Difference]: With dead ends: 2493 [2022-02-15 13:33:46,786 INFO L226 Difference]: Without dead ends: 2340 [2022-02-15 13:33:46,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:33:46,786 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 156 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:46,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 367 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:33:46,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2022-02-15 13:33:46,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 1802. [2022-02-15 13:33:46,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1801 states have (on average 3.263742365352582) internal successors, (5878), 1801 states have internal predecessors, (5878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 5878 transitions. [2022-02-15 13:33:46,810 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 5878 transitions. Word has length 24 [2022-02-15 13:33:46,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:46,810 INFO L470 AbstractCegarLoop]: Abstraction has 1802 states and 5878 transitions. [2022-02-15 13:33:46,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2022-02-15 13:33:46,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 5878 transitions. [2022-02-15 13:33:46,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:46,812 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:46,812 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:46,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:47,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-02-15 13:33:47,028 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:47,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:47,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1068770537, now seen corresponding path program 251 times [2022-02-15 13:33:47,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:47,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485943376] [2022-02-15 13:33:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:47,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:47,128 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:47,128 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:47,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485943376] [2022-02-15 13:33:47,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485943376] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:47,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535031558] [2022-02-15 13:33:47,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:33:47,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:47,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:47,129 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) [2022-02-15 13:33:47,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-02-15 13:33:47,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:33:47,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:47,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:47,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:47,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:33:47,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:33:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:47,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:47,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:47,534 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 73 treesize of output 66 [2022-02-15 13:33:47,666 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:47,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:33:47,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:47,669 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 25 treesize of output 27 [2022-02-15 13:33:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:47,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535031558] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:47,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:47,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:33:47,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535096757] [2022-02-15 13:33:47,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:47,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:33:47,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:47,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:33:47,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:33:47,682 INFO L87 Difference]: Start difference. First operand 1802 states and 5878 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) [2022-02-15 13:33:47,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:47,919 INFO L93 Difference]: Finished difference Result 2050 states and 6629 transitions. [2022-02-15 13:33:47,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:33:47,919 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 24 [2022-02-15 13:33:47,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:47,922 INFO L225 Difference]: With dead ends: 2050 [2022-02-15 13:33:47,922 INFO L226 Difference]: Without dead ends: 2019 [2022-02-15 13:33:47,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:47,923 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 89 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:47,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 195 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:33:47,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2022-02-15 13:33:47,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1802. [2022-02-15 13:33:47,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1802 states, 1801 states have (on average 3.263742365352582) internal successors, (5878), 1801 states have internal predecessors, (5878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1802 states to 1802 states and 5878 transitions. [2022-02-15 13:33:47,942 INFO L78 Accepts]: Start accepts. Automaton has 1802 states and 5878 transitions. Word has length 24 [2022-02-15 13:33:47,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:47,942 INFO L470 AbstractCegarLoop]: Abstraction has 1802 states and 5878 transitions. [2022-02-15 13:33:47,942 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) [2022-02-15 13:33:47,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1802 states and 5878 transitions. [2022-02-15 13:33:47,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:47,944 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:47,944 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:47,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:48,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-02-15 13:33:48,158 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:48,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:48,159 INFO L85 PathProgramCache]: Analyzing trace with hash 487009757, now seen corresponding path program 252 times [2022-02-15 13:33:48,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:48,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674697540] [2022-02-15 13:33:48,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:48,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:48,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:48,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674697540] [2022-02-15 13:33:48,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674697540] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:48,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169205980] [2022-02-15 13:33:48,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:33:48,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:48,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:48,291 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) [2022-02-15 13:33:48,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-02-15 13:33:48,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:33:48,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:48,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:48,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:48,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:48,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:33:48,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:48,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 37 [2022-02-15 13:33:48,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:48,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:33:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:48,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:49,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:49,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-15 13:33:49,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:49,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:33:49,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:49,239 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 25 treesize of output 27 [2022-02-15 13:33:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:49,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169205980] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:49,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:49,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:33:49,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632333784] [2022-02-15 13:33:49,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:49,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:33:49,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:49,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:33:49,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:33:49,254 INFO L87 Difference]: Start difference. First operand 1802 states and 5878 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) [2022-02-15 13:33:49,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:49,495 INFO L93 Difference]: Finished difference Result 1943 states and 6265 transitions. [2022-02-15 13:33:49,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:33:49,496 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 24 [2022-02-15 13:33:49,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:49,498 INFO L225 Difference]: With dead ends: 1943 [2022-02-15 13:33:49,499 INFO L226 Difference]: Without dead ends: 1877 [2022-02-15 13:33:49,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:33:49,499 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:49,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 191 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 611 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2022-02-15 13:33:49,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2022-02-15 13:33:49,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1803. [2022-02-15 13:33:49,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1802 states have (on average 3.2641509433962264) internal successors, (5882), 1802 states have internal predecessors, (5882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:49,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 5882 transitions. [2022-02-15 13:33:49,519 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 5882 transitions. Word has length 24 [2022-02-15 13:33:49,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:49,519 INFO L470 AbstractCegarLoop]: Abstraction has 1803 states and 5882 transitions. [2022-02-15 13:33:49,519 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) [2022-02-15 13:33:49,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 5882 transitions. [2022-02-15 13:33:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:49,521 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:49,521 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:49,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:49,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:49,737 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:49,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:49,738 INFO L85 PathProgramCache]: Analyzing trace with hash 371489043, now seen corresponding path program 253 times [2022-02-15 13:33:49,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:49,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439187404] [2022-02-15 13:33:49,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:49,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:49,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:49,878 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:49,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:49,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439187404] [2022-02-15 13:33:49,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439187404] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:49,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223610896] [2022-02-15 13:33:49,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:33:49,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:49,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:49,880 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) [2022-02-15 13:33:49,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-02-15 13:33:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:49,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:49,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:49,964 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 41 treesize of output 35 [2022-02-15 13:33:50,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:50,036 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:33:50,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:50,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 treesize of output 7 [2022-02-15 13:33:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:50,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:50,567 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:50,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-02-15 13:33:50,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:50,682 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 31 treesize of output 33 [2022-02-15 13:33:50,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:50,684 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 25 treesize of output 27 [2022-02-15 13:33:50,696 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:50,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223610896] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:50,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:50,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:50,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39270856] [2022-02-15 13:33:50,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:50,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:50,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:50,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:50,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:50,697 INFO L87 Difference]: Start difference. First operand 1803 states and 5882 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:51,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:51,376 INFO L93 Difference]: Finished difference Result 2240 states and 7153 transitions. [2022-02-15 13:33:51,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:33:51,376 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:51,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:51,380 INFO L225 Difference]: With dead ends: 2240 [2022-02-15 13:33:51,380 INFO L226 Difference]: Without dead ends: 2140 [2022-02-15 13:33:51,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:33:51,380 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 118 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:51,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 293 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 944 Invalid, 0 Unknown, 185 Unchecked, 0.3s Time] [2022-02-15 13:33:51,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2022-02-15 13:33:51,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 1812. [2022-02-15 13:33:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1812 states, 1811 states have (on average 3.2689122032026505) internal successors, (5920), 1811 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:51,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1812 states to 1812 states and 5920 transitions. [2022-02-15 13:33:51,402 INFO L78 Accepts]: Start accepts. Automaton has 1812 states and 5920 transitions. Word has length 24 [2022-02-15 13:33:51,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:51,402 INFO L470 AbstractCegarLoop]: Abstraction has 1812 states and 5920 transitions. [2022-02-15 13:33:51,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:51,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1812 states and 5920 transitions. [2022-02-15 13:33:51,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:51,404 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:51,404 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:51,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:51,611 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,SelfDestructingSolverStorable268 [2022-02-15 13:33:51,611 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:51,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:51,611 INFO L85 PathProgramCache]: Analyzing trace with hash -69318803, now seen corresponding path program 254 times [2022-02-15 13:33:51,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:51,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906547106] [2022-02-15 13:33:51,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:51,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:51,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:51,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906547106] [2022-02-15 13:33:51,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906547106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:51,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871785289] [2022-02-15 13:33:51,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:33:51,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:51,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:51,832 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) [2022-02-15 13:33:51,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-02-15 13:33:51,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:33:51,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:51,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:51,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:51,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:33:52,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:52,130 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:33:52,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:52,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 12 treesize of output 3 [2022-02-15 13:33:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:52,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:52,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:52,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:33:53,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:53,053 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 31 treesize of output 33 [2022-02-15 13:33:53,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:53,057 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 25 treesize of output 27 [2022-02-15 13:33:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:53,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871785289] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:53,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:53,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:53,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269502380] [2022-02-15 13:33:53,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:53,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:53,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:53,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:53,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:53,082 INFO L87 Difference]: Start difference. First operand 1812 states and 5920 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:53,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:53,626 INFO L93 Difference]: Finished difference Result 2112 states and 6824 transitions. [2022-02-15 13:33:53,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:33:53,626 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:53,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:53,630 INFO L225 Difference]: With dead ends: 2112 [2022-02-15 13:33:53,630 INFO L226 Difference]: Without dead ends: 2082 [2022-02-15 13:33:53,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:33:53,631 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 110 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:53,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 290 Invalid, 970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 931 Invalid, 0 Unknown, 17 Unchecked, 0.3s Time] [2022-02-15 13:33:53,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2022-02-15 13:33:53,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 1815. [2022-02-15 13:33:53,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1814 states have (on average 3.2695700110253583) internal successors, (5931), 1814 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 5931 transitions. [2022-02-15 13:33:53,652 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 5931 transitions. Word has length 24 [2022-02-15 13:33:53,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:53,652 INFO L470 AbstractCegarLoop]: Abstraction has 1815 states and 5931 transitions. [2022-02-15 13:33:53,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 5931 transitions. [2022-02-15 13:33:53,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:53,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:53,654 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:53,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:53,863 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,SelfDestructingSolverStorable269 [2022-02-15 13:33:53,863 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:53,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:53,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1177075131, now seen corresponding path program 255 times [2022-02-15 13:33:53,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:53,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575852481] [2022-02-15 13:33:53,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:53,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:53,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:54,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:54,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575852481] [2022-02-15 13:33:54,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575852481] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:54,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932130935] [2022-02-15 13:33:54,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:33:54,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:54,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:54,014 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) [2022-02-15 13:33:54,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-02-15 13:33:54,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:33:54,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:54,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:54,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:54,097 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 41 treesize of output 35 [2022-02-15 13:33:54,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:54,217 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:33:54,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:54,218 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:33:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:54,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:54,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:54,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 75 [2022-02-15 13:33:54,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:54,706 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 31 treesize of output 33 [2022-02-15 13:33:54,708 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:54,708 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 25 treesize of output 27 [2022-02-15 13:33:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:54,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932130935] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:54,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:54,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:54,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106053491] [2022-02-15 13:33:54,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:54,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:54,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:54,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:54,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:54,723 INFO L87 Difference]: Start difference. First operand 1815 states and 5931 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:55,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:55,225 INFO L93 Difference]: Finished difference Result 2215 states and 7068 transitions. [2022-02-15 13:33:55,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:33:55,225 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:55,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:55,229 INFO L225 Difference]: With dead ends: 2215 [2022-02-15 13:33:55,229 INFO L226 Difference]: Without dead ends: 2142 [2022-02-15 13:33:55,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:33:55,230 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 114 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:55,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 322 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 813 Invalid, 0 Unknown, 84 Unchecked, 0.3s Time] [2022-02-15 13:33:55,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2022-02-15 13:33:55,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 1822. [2022-02-15 13:33:55,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.2668863261943986) internal successors, (5949), 1821 states have internal predecessors, (5949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 5949 transitions. [2022-02-15 13:33:55,254 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 5949 transitions. Word has length 24 [2022-02-15 13:33:55,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:55,255 INFO L470 AbstractCegarLoop]: Abstraction has 1822 states and 5949 transitions. [2022-02-15 13:33:55,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:55,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 5949 transitions. [2022-02-15 13:33:55,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:55,257 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:55,257 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:55,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:55,474 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,SelfDestructingSolverStorable270 [2022-02-15 13:33:55,474 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:55,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:55,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1319853033, now seen corresponding path program 256 times [2022-02-15 13:33:55,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:55,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398323297] [2022-02-15 13:33:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:55,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:55,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:55,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:55,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398323297] [2022-02-15 13:33:55,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398323297] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:55,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816531621] [2022-02-15 13:33:55,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:33:55,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:55,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:55,591 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) [2022-02-15 13:33:55,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-02-15 13:33:55,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:33:55,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:55,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:55,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:55,682 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 41 treesize of output 35 [2022-02-15 13:33:55,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:55,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 29 [2022-02-15 13:33:55,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:55,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 12 treesize of output 3 [2022-02-15 13:33:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:55,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:56,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:56,315 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 141 treesize of output 121 [2022-02-15 13:33:56,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:56,447 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 31 treesize of output 33 [2022-02-15 13:33:56,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:56,449 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 25 treesize of output 27 [2022-02-15 13:33:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:56,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816531621] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:56,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:56,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:56,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553081983] [2022-02-15 13:33:56,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:56,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:56,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:56,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:56,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:56,467 INFO L87 Difference]: Start difference. First operand 1822 states and 5949 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:56,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:56,683 INFO L93 Difference]: Finished difference Result 2120 states and 6810 transitions. [2022-02-15 13:33:56,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:33:56,683 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:33:56,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:56,686 INFO L225 Difference]: With dead ends: 2120 [2022-02-15 13:33:56,686 INFO L226 Difference]: Without dead ends: 2106 [2022-02-15 13:33:56,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:33:56,687 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 79 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:56,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 246 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 627 Invalid, 0 Unknown, 121 Unchecked, 0.2s Time] [2022-02-15 13:33:56,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2022-02-15 13:33:56,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1814. [2022-02-15 13:33:56,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 3.2691671263099833) internal successors, (5927), 1813 states have internal predecessors, (5927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 5927 transitions. [2022-02-15 13:33:56,708 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 5927 transitions. Word has length 24 [2022-02-15 13:33:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:56,708 INFO L470 AbstractCegarLoop]: Abstraction has 1814 states and 5927 transitions. [2022-02-15 13:33:56,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:33:56,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 5927 transitions. [2022-02-15 13:33:56,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:56,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:56,710 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:56,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-02-15 13:33:56,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:56,926 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:56,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:56,926 INFO L85 PathProgramCache]: Analyzing trace with hash -251962373, now seen corresponding path program 257 times [2022-02-15 13:33:56,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:56,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708121638] [2022-02-15 13:33:56,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:56,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:33:57,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:57,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708121638] [2022-02-15 13:33:57,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708121638] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:57,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264232096] [2022-02-15 13:33:57,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:33:57,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:57,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:57,129 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) [2022-02-15 13:33:57,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-02-15 13:33:57,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:33:57,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:57,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:57,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:57,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:33:57,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:57,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-02-15 13:33:57,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:33:57,440 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 8 [2022-02-15 13:33:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:33:57,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:57,968 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:57,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:33:58,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:58,117 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 31 treesize of output 33 [2022-02-15 13:33:58,119 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:58,119 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 25 treesize of output 27 [2022-02-15 13:33:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:33:58,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264232096] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:58,131 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:58,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:58,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39772466] [2022-02-15 13:33:58,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:58,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:58,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:58,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:58,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:58,132 INFO L87 Difference]: Start difference. First operand 1814 states and 5927 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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) [2022-02-15 13:33:58,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:33:58,620 INFO L93 Difference]: Finished difference Result 2174 states and 6960 transitions. [2022-02-15 13:33:58,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:33:58,621 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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 24 [2022-02-15 13:33:58,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:33:58,625 INFO L225 Difference]: With dead ends: 2174 [2022-02-15 13:33:58,625 INFO L226 Difference]: Without dead ends: 2124 [2022-02-15 13:33:58,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:33:58,625 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 87 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:33:58,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 358 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1017 Invalid, 0 Unknown, 256 Unchecked, 0.3s Time] [2022-02-15 13:33:58,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2022-02-15 13:33:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1808. [2022-02-15 13:33:58,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1807 states have (on average 3.2667404537908133) internal successors, (5903), 1807 states have internal predecessors, (5903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:33:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 5903 transitions. [2022-02-15 13:33:58,654 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 5903 transitions. Word has length 24 [2022-02-15 13:33:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:33:58,654 INFO L470 AbstractCegarLoop]: Abstraction has 1808 states and 5903 transitions. [2022-02-15 13:33:58,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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) [2022-02-15 13:33:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 5903 transitions. [2022-02-15 13:33:58,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:33:58,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:33:58,657 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:33:58,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-02-15 13:33:58,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:58,863 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:33:58,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:33:58,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1661477901, now seen corresponding path program 258 times [2022-02-15 13:33:58,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:33:58,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980163673] [2022-02-15 13:33:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:33:58,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:33:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:33:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:59,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:33:59,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980163673] [2022-02-15 13:33:59,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980163673] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:33:59,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949101163] [2022-02-15 13:33:59,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:33:59,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:33:59,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:33:59,003 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) [2022-02-15 13:33:59,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-02-15 13:33:59,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:33:59,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:33:59,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:33:59,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:33:59,120 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 41 treesize of output 35 [2022-02-15 13:33:59,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:33:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:59,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:33:59,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:59,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:33:59,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:59,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:33:59,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:33:59,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:33:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:33:59,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949101163] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:33:59,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:33:59,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:33:59,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367640274] [2022-02-15 13:33:59,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:33:59,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:33:59,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:33:59,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:33:59,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:33:59,929 INFO L87 Difference]: Start difference. First operand 1808 states and 5903 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:00,807 INFO L93 Difference]: Finished difference Result 2322 states and 7384 transitions. [2022-02-15 13:34:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:34:00,807 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:00,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:00,822 INFO L225 Difference]: With dead ends: 2322 [2022-02-15 13:34:00,823 INFO L226 Difference]: Without dead ends: 2221 [2022-02-15 13:34:00,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:34:00,823 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 104 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:00,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 294 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:34:00,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2022-02-15 13:34:00,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1818. [2022-02-15 13:34:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 3.263621353880022) internal successors, (5930), 1817 states have internal predecessors, (5930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:00,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 5930 transitions. [2022-02-15 13:34:00,846 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 5930 transitions. Word has length 24 [2022-02-15 13:34:00,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:00,846 INFO L470 AbstractCegarLoop]: Abstraction has 1818 states and 5930 transitions. [2022-02-15 13:34:00,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:00,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 5930 transitions. [2022-02-15 13:34:00,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:00,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:00,848 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:00,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-02-15 13:34:01,056 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,SelfDestructingSolverStorable273 [2022-02-15 13:34:01,057 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:01,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:01,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1120487053, now seen corresponding path program 259 times [2022-02-15 13:34:01,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:01,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603396407] [2022-02-15 13:34:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:01,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:34:01,230 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:01,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603396407] [2022-02-15 13:34:01,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603396407] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:01,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046031186] [2022-02-15 13:34:01,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:34:01,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:01,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:01,232 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) [2022-02-15 13:34:01,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-02-15 13:34:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:01,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:01,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:01,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:34:01,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:01,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 29 [2022-02-15 13:34:01,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:01,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 12 treesize of output 3 [2022-02-15 13:34:01,669 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:34:01,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:02,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:02,194 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 141 treesize of output 121 [2022-02-15 13:34:02,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:02,393 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 31 treesize of output 33 [2022-02-15 13:34:02,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:02,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:34:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:34:02,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046031186] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:02,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:02,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:02,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851127333] [2022-02-15 13:34:02,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:02,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:02,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:02,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:02,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:02,419 INFO L87 Difference]: Start difference. First operand 1818 states and 5930 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:02,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:02,892 INFO L93 Difference]: Finished difference Result 2136 states and 6847 transitions. [2022-02-15 13:34:02,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:34:02,892 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:02,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:02,896 INFO L225 Difference]: With dead ends: 2136 [2022-02-15 13:34:02,896 INFO L226 Difference]: Without dead ends: 2098 [2022-02-15 13:34:02,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:34:02,896 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 73 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:02,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 321 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 764 Invalid, 0 Unknown, 142 Unchecked, 0.3s Time] [2022-02-15 13:34:02,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2022-02-15 13:34:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1820. [2022-02-15 13:34:02,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 3.263881253435954) internal successors, (5937), 1819 states have internal predecessors, (5937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:02,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 5937 transitions. [2022-02-15 13:34:02,919 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 5937 transitions. Word has length 24 [2022-02-15 13:34:02,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:02,919 INFO L470 AbstractCegarLoop]: Abstraction has 1820 states and 5937 transitions. [2022-02-15 13:34:02,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:02,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 5937 transitions. [2022-02-15 13:34:02,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:02,922 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:02,922 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:02,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-02-15 13:34:03,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:03,127 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:03,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:03,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2000926113, now seen corresponding path program 260 times [2022-02-15 13:34:03,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:03,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524351963] [2022-02-15 13:34:03,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:03,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:03,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:03,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524351963] [2022-02-15 13:34:03,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524351963] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:03,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510016904] [2022-02-15 13:34:03,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:34:03,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:03,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:03,290 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) [2022-02-15 13:34:03,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-02-15 13:34:03,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:34:03,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:03,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:03,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:03,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:34:03,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:03,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:34:03,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:03,505 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:34:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:03,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:03,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:03,870 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 79 treesize of output 70 [2022-02-15 13:34:03,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:03,953 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 31 treesize of output 33 [2022-02-15 13:34:03,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:03,956 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 25 treesize of output 27 [2022-02-15 13:34:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:03,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510016904] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:03,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:03,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:34:03,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399963807] [2022-02-15 13:34:03,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:03,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:34:03,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:03,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:34:03,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:34:03,969 INFO L87 Difference]: Start difference. First operand 1820 states and 5937 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) [2022-02-15 13:34:04,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:04,370 INFO L93 Difference]: Finished difference Result 2139 states and 6855 transitions. [2022-02-15 13:34:04,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:34:04,370 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 24 [2022-02-15 13:34:04,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:04,373 INFO L225 Difference]: With dead ends: 2139 [2022-02-15 13:34:04,373 INFO L226 Difference]: Without dead ends: 2061 [2022-02-15 13:34:04,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:34:04,374 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 108 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:04,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 242 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 705 Invalid, 0 Unknown, 161 Unchecked, 0.2s Time] [2022-02-15 13:34:04,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2022-02-15 13:34:04,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1822. [2022-02-15 13:34:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1821 states have (on average 3.2613948380010984) internal successors, (5939), 1821 states have internal predecessors, (5939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:04,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 5939 transitions. [2022-02-15 13:34:04,395 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 5939 transitions. Word has length 24 [2022-02-15 13:34:04,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:04,395 INFO L470 AbstractCegarLoop]: Abstraction has 1822 states and 5939 transitions. [2022-02-15 13:34:04,395 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) [2022-02-15 13:34:04,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 5939 transitions. [2022-02-15 13:34:04,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:04,397 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:04,397 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:04,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:04,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:04,603 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:04,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:04,603 INFO L85 PathProgramCache]: Analyzing trace with hash 116185995, now seen corresponding path program 261 times [2022-02-15 13:34:04,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:04,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501557875] [2022-02-15 13:34:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:04,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:04,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:04,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501557875] [2022-02-15 13:34:04,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501557875] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:04,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813389935] [2022-02-15 13:34:04,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:34:04,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:04,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:04,718 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) [2022-02-15 13:34:04,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-02-15 13:34:04,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:34:04,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:04,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:04,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:04,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:34:04,863 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 30 treesize of output 24 [2022-02-15 13:34:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:04,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:05,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:05,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:34:05,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:05,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:34:05,376 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:05,376 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 25 treesize of output 27 [2022-02-15 13:34:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:05,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813389935] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:05,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:05,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-15 13:34:05,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893891293] [2022-02-15 13:34:05,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:05,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:34:05,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:05,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:34:05,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:34:05,390 INFO L87 Difference]: Start difference. First operand 1822 states and 5939 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) [2022-02-15 13:34:05,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:05,616 INFO L93 Difference]: Finished difference Result 2090 states and 6749 transitions. [2022-02-15 13:34:05,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:34:05,617 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 24 [2022-02-15 13:34:05,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:05,620 INFO L225 Difference]: With dead ends: 2090 [2022-02-15 13:34:05,620 INFO L226 Difference]: Without dead ends: 2059 [2022-02-15 13:34:05,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:34:05,620 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 78 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:05,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 184 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 607 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2022-02-15 13:34:05,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2022-02-15 13:34:05,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1838. [2022-02-15 13:34:05,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1837 states have (on average 3.2585737615677735) internal successors, (5986), 1837 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:05,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 5986 transitions. [2022-02-15 13:34:05,642 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 5986 transitions. Word has length 24 [2022-02-15 13:34:05,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:05,643 INFO L470 AbstractCegarLoop]: Abstraction has 1838 states and 5986 transitions. [2022-02-15 13:34:05,643 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) [2022-02-15 13:34:05,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 5986 transitions. [2022-02-15 13:34:05,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:05,645 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:05,645 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:05,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-02-15 13:34:05,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:05,849 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:05,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:05,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1967210799, now seen corresponding path program 262 times [2022-02-15 13:34:05,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:05,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198993053] [2022-02-15 13:34:05,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:05,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:05,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:05,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198993053] [2022-02-15 13:34:05,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198993053] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:05,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324299401] [2022-02-15 13:34:05,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:34:05,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:05,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:05,971 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) [2022-02-15 13:34:05,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-02-15 13:34:05,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:34:05,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:05,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:34:05,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:06,072 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 26 treesize of output 20 [2022-02-15 13:34:06,169 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 30 treesize of output 24 [2022-02-15 13:34:06,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:06,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:06,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:06,721 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 110 treesize of output 98 [2022-02-15 13:34:06,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:06,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:34:06,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:06,869 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 29 treesize of output 31 [2022-02-15 13:34:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:06,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324299401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:06,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:06,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:34:06,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424561845] [2022-02-15 13:34:06,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:06,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:34:06,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:06,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:34:06,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:34:06,886 INFO L87 Difference]: Start difference. First operand 1838 states and 5986 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2022-02-15 13:34:07,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:07,855 INFO L93 Difference]: Finished difference Result 2459 states and 7733 transitions. [2022-02-15 13:34:07,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:34:07,856 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 24 [2022-02-15 13:34:07,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:07,860 INFO L225 Difference]: With dead ends: 2459 [2022-02-15 13:34:07,860 INFO L226 Difference]: Without dead ends: 2337 [2022-02-15 13:34:07,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:34:07,860 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 113 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:07,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 397 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 968 Invalid, 0 Unknown, 67 Unchecked, 0.4s Time] [2022-02-15 13:34:07,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2022-02-15 13:34:07,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 1838. [2022-02-15 13:34:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1838 states, 1837 states have (on average 3.2585737615677735) internal successors, (5986), 1837 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1838 states to 1838 states and 5986 transitions. [2022-02-15 13:34:07,884 INFO L78 Accepts]: Start accepts. Automaton has 1838 states and 5986 transitions. Word has length 24 [2022-02-15 13:34:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:07,884 INFO L470 AbstractCegarLoop]: Abstraction has 1838 states and 5986 transitions. [2022-02-15 13:34:07,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2022-02-15 13:34:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1838 states and 5986 transitions. [2022-02-15 13:34:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:07,886 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:07,886 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:07,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:08,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-02-15 13:34:08,102 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:08,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:08,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1084990569, now seen corresponding path program 263 times [2022-02-15 13:34:08,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:08,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644021674] [2022-02-15 13:34:08,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:08,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:08,280 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:08,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644021674] [2022-02-15 13:34:08,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644021674] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:08,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584620345] [2022-02-15 13:34:08,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:34:08,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:08,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:08,281 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) [2022-02-15 13:34:08,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-02-15 13:34:08,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:34:08,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:08,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:08,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:08,394 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 26 treesize of output 20 [2022-02-15 13:34:08,434 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 30 treesize of output 24 [2022-02-15 13:34:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:08,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:09,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:09,084 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 143 treesize of output 123 [2022-02-15 13:34:09,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:09,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:34:09,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:09,192 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 25 treesize of output 27 [2022-02-15 13:34:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:09,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584620345] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:09,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:09,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:34:09,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317792162] [2022-02-15 13:34:09,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:09,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:34:09,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:09,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:34:09,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:34:09,205 INFO L87 Difference]: Start difference. First operand 1838 states and 5986 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) [2022-02-15 13:34:09,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:09,439 INFO L93 Difference]: Finished difference Result 2177 states and 6972 transitions. [2022-02-15 13:34:09,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:34:09,439 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 24 [2022-02-15 13:34:09,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:09,442 INFO L225 Difference]: With dead ends: 2177 [2022-02-15 13:34:09,442 INFO L226 Difference]: Without dead ends: 2127 [2022-02-15 13:34:09,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:34:09,443 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:09,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 197 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:34:09,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2022-02-15 13:34:09,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1832. [2022-02-15 13:34:09,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 3.2561441835062808) internal successors, (5962), 1831 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:09,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 5962 transitions. [2022-02-15 13:34:09,465 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 5962 transitions. Word has length 24 [2022-02-15 13:34:09,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:09,465 INFO L470 AbstractCegarLoop]: Abstraction has 1832 states and 5962 transitions. [2022-02-15 13:34:09,465 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) [2022-02-15 13:34:09,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 5962 transitions. [2022-02-15 13:34:09,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:09,467 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:09,467 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:09,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:09,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-02-15 13:34:09,683 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:09,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:09,683 INFO L85 PathProgramCache]: Analyzing trace with hash 291174387, now seen corresponding path program 264 times [2022-02-15 13:34:09,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:09,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009755318] [2022-02-15 13:34:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:09,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:09,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:09,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009755318] [2022-02-15 13:34:09,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009755318] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:09,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599972000] [2022-02-15 13:34:09,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:34:09,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:09,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:09,798 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) [2022-02-15 13:34:09,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-02-15 13:34:09,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:34:09,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:09,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:09,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:09,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:34:09,927 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 30 treesize of output 24 [2022-02-15 13:34:10,002 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:10,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:10,327 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:10,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-02-15 13:34:10,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:10,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:34:10,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:10,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:34:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:10,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599972000] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:10,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:10,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:34:10,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986307945] [2022-02-15 13:34:10,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:10,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:34:10,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:10,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:34:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:34:10,484 INFO L87 Difference]: Start difference. First operand 1832 states and 5962 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:10,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:10,831 INFO L93 Difference]: Finished difference Result 2359 states and 7576 transitions. [2022-02-15 13:34:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:34:10,831 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:34:10,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:10,835 INFO L225 Difference]: With dead ends: 2359 [2022-02-15 13:34:10,835 INFO L226 Difference]: Without dead ends: 2297 [2022-02-15 13:34:10,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:10,835 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 151 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:10,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 237 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:34:10,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2022-02-15 13:34:10,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 1832. [2022-02-15 13:34:10,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1831 states have (on average 3.2561441835062808) internal successors, (5962), 1831 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 5962 transitions. [2022-02-15 13:34:10,859 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 5962 transitions. Word has length 24 [2022-02-15 13:34:10,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:10,859 INFO L470 AbstractCegarLoop]: Abstraction has 1832 states and 5962 transitions. [2022-02-15 13:34:10,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:10,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 5962 transitions. [2022-02-15 13:34:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:10,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:10,861 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:10,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:11,077 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,SelfDestructingSolverStorable279 [2022-02-15 13:34:11,077 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:11,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:11,077 INFO L85 PathProgramCache]: Analyzing trace with hash 892806561, now seen corresponding path program 265 times [2022-02-15 13:34:11,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:11,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022361908] [2022-02-15 13:34:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:11,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:11,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:11,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022361908] [2022-02-15 13:34:11,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022361908] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:11,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993824721] [2022-02-15 13:34:11,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:34:11,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:11,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:11,241 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) [2022-02-15 13:34:11,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-02-15 13:34:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:11,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:34:11,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:11,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:34:11,419 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 43 treesize of output 37 [2022-02-15 13:34:11,629 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:11,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:12,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:12,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-02-15 13:34:12,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:12,505 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 35 treesize of output 37 [2022-02-15 13:34:12,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:12,509 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 29 treesize of output 31 [2022-02-15 13:34:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:12,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993824721] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:12,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:12,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:12,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392662220] [2022-02-15 13:34:12,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:12,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:12,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:12,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:12,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:12,527 INFO L87 Difference]: Start difference. First operand 1832 states and 5962 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:15,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:15,784 INFO L93 Difference]: Finished difference Result 3529 states and 10758 transitions. [2022-02-15 13:34:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:34:15,784 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:15,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:15,790 INFO L225 Difference]: With dead ends: 3529 [2022-02-15 13:34:15,790 INFO L226 Difference]: Without dead ends: 3294 [2022-02-15 13:34:15,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=466, Invalid=2186, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:34:15,791 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 323 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:15,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 506 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:34:15,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2022-02-15 13:34:15,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 1870. [2022-02-15 13:34:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 3.2739432851792403) internal successors, (6119), 1869 states have internal predecessors, (6119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 6119 transitions. [2022-02-15 13:34:15,833 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 6119 transitions. Word has length 24 [2022-02-15 13:34:15,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:15,833 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 6119 transitions. [2022-02-15 13:34:15,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:15,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 6119 transitions. [2022-02-15 13:34:15,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:15,835 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:15,836 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:15,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:16,051 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,SelfDestructingSolverStorable280 [2022-02-15 13:34:16,051 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:16,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:16,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1302786487, now seen corresponding path program 266 times [2022-02-15 13:34:16,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:16,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138807216] [2022-02-15 13:34:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:16,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:16,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:16,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138807216] [2022-02-15 13:34:16,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138807216] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:16,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400464915] [2022-02-15 13:34:16,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:34:16,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:16,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:16,266 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) [2022-02-15 13:34:16,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-02-15 13:34:16,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:34:16,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:16,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:16,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:16,350 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 41 treesize of output 35 [2022-02-15 13:34:16,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:16,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:34:16,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:16,524 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:34:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:16,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:17,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:17,266 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 120 treesize of output 104 [2022-02-15 13:34:17,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:17,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:34:17,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:17,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:34:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:17,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400464915] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:17,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:17,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:17,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142140608] [2022-02-15 13:34:17,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:17,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:17,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:17,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:17,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:17,352 INFO L87 Difference]: Start difference. First operand 1870 states and 6119 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:17,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:17,859 INFO L93 Difference]: Finished difference Result 2381 states and 7731 transitions. [2022-02-15 13:34:17,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:34:17,859 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:17,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:17,863 INFO L225 Difference]: With dead ends: 2381 [2022-02-15 13:34:17,863 INFO L226 Difference]: Without dead ends: 2296 [2022-02-15 13:34:17,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:34:17,863 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 108 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:17,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 232 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 709 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2022-02-15 13:34:17,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2022-02-15 13:34:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1879. [2022-02-15 13:34:17,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.2774227902023427) internal successors, (6155), 1878 states have internal predecessors, (6155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6155 transitions. [2022-02-15 13:34:17,906 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6155 transitions. Word has length 24 [2022-02-15 13:34:17,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:17,906 INFO L470 AbstractCegarLoop]: Abstraction has 1879 states and 6155 transitions. [2022-02-15 13:34:17,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:17,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6155 transitions. [2022-02-15 13:34:17,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:17,908 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:17,908 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:17,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:18,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:18,117 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:18,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:18,118 INFO L85 PathProgramCache]: Analyzing trace with hash -771278327, now seen corresponding path program 267 times [2022-02-15 13:34:18,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:18,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239735155] [2022-02-15 13:34:18,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:18,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:18,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:18,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239735155] [2022-02-15 13:34:18,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239735155] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:18,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257797556] [2022-02-15 13:34:18,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:34:18,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:18,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:18,287 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) [2022-02-15 13:34:18,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-02-15 13:34:18,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:34:18,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:18,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:18,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:18,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:34:18,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:18,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 29 [2022-02-15 13:34:18,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:18,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 12 treesize of output 3 [2022-02-15 13:34:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:18,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:19,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:19,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-02-15 13:34:19,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:19,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:34:19,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:19,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:34:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:19,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257797556] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:19,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:19,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:19,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780434146] [2022-02-15 13:34:19,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:19,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:19,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:19,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:19,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:19,632 INFO L87 Difference]: Start difference. First operand 1879 states and 6155 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:20,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:20,074 INFO L93 Difference]: Finished difference Result 2291 states and 7483 transitions. [2022-02-15 13:34:20,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:34:20,075 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:20,079 INFO L225 Difference]: With dead ends: 2291 [2022-02-15 13:34:20,079 INFO L226 Difference]: Without dead ends: 2260 [2022-02-15 13:34:20,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:34:20,079 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 78 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:20,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 358 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 783 Invalid, 0 Unknown, 83 Unchecked, 0.3s Time] [2022-02-15 13:34:20,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2022-02-15 13:34:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 1881. [2022-02-15 13:34:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1881 states, 1880 states have (on average 3.276063829787234) internal successors, (6159), 1880 states have internal predecessors, (6159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1881 states to 1881 states and 6159 transitions. [2022-02-15 13:34:20,101 INFO L78 Accepts]: Start accepts. Automaton has 1881 states and 6159 transitions. Word has length 24 [2022-02-15 13:34:20,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:20,101 INFO L470 AbstractCegarLoop]: Abstraction has 1881 states and 6159 transitions. [2022-02-15 13:34:20,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1881 states and 6159 transitions. [2022-02-15 13:34:20,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:20,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:20,104 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:20,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-02-15 13:34:20,319 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,SelfDestructingSolverStorable282 [2022-02-15 13:34:20,319 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:20,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:20,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1446660255, now seen corresponding path program 268 times [2022-02-15 13:34:20,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:20,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154777968] [2022-02-15 13:34:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:20,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:20,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:20,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154777968] [2022-02-15 13:34:20,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154777968] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:20,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716451993] [2022-02-15 13:34:20,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:34:20,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:20,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:20,518 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) [2022-02-15 13:34:20,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-02-15 13:34:20,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:34:20,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:20,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:34:20,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:20,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:34:20,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:20,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-02-15 13:34:20,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:20,935 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 8 [2022-02-15 13:34:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:20,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:21,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:21,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-15 13:34:21,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:21,562 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 35 treesize of output 37 [2022-02-15 13:34:21,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:21,565 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 29 treesize of output 31 [2022-02-15 13:34:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:21,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716451993] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:21,580 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:21,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:21,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095345110] [2022-02-15 13:34:21,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:21,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:21,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:21,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:21,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:21,580 INFO L87 Difference]: Start difference. First operand 1881 states and 6159 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:21,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:21,909 INFO L93 Difference]: Finished difference Result 2314 states and 7510 transitions. [2022-02-15 13:34:21,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:34:21,909 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:21,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:21,913 INFO L225 Difference]: With dead ends: 2314 [2022-02-15 13:34:21,913 INFO L226 Difference]: Without dead ends: 2232 [2022-02-15 13:34:21,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:34:21,913 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 121 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:21,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 301 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 782 Invalid, 0 Unknown, 218 Unchecked, 0.2s Time] [2022-02-15 13:34:21,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2232 states. [2022-02-15 13:34:21,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2232 to 1872. [2022-02-15 13:34:21,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 3.274719401389631) internal successors, (6127), 1871 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 6127 transitions. [2022-02-15 13:34:21,935 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 6127 transitions. Word has length 24 [2022-02-15 13:34:21,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:21,935 INFO L470 AbstractCegarLoop]: Abstraction has 1872 states and 6127 transitions. [2022-02-15 13:34:21,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:21,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 6127 transitions. [2022-02-15 13:34:21,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:21,938 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:21,938 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:21,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:22,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:22,154 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:22,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:22,154 INFO L85 PathProgramCache]: Analyzing trace with hash -566670911, now seen corresponding path program 269 times [2022-02-15 13:34:22,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:22,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073646631] [2022-02-15 13:34:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:22,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:22,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:22,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073646631] [2022-02-15 13:34:22,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073646631] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:22,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37828789] [2022-02-15 13:34:22,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:34:22,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:22,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:22,279 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) [2022-02-15 13:34:22,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-02-15 13:34:22,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:34:22,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:22,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:22,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:22,339 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 41 treesize of output 35 [2022-02-15 13:34:22,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:22,481 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:34:22,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:22,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 treesize of output 7 [2022-02-15 13:34:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:22,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:22,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:22,869 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 51 treesize of output 48 [2022-02-15 13:34:22,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:22,912 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 31 treesize of output 33 [2022-02-15 13:34:22,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:22,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:34:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:22,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37828789] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:22,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:22,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:22,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948792241] [2022-02-15 13:34:22,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:22,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:22,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:22,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:22,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:22,931 INFO L87 Difference]: Start difference. First operand 1872 states and 6127 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:23,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:23,508 INFO L93 Difference]: Finished difference Result 2513 states and 8185 transitions. [2022-02-15 13:34:23,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 13:34:23,508 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:23,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:23,513 INFO L225 Difference]: With dead ends: 2513 [2022-02-15 13:34:23,513 INFO L226 Difference]: Without dead ends: 2451 [2022-02-15 13:34:23,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:34:23,514 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 116 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:23,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 372 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 730 Invalid, 0 Unknown, 306 Unchecked, 0.2s Time] [2022-02-15 13:34:23,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2022-02-15 13:34:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1872. [2022-02-15 13:34:23,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 3.274719401389631) internal successors, (6127), 1871 states have internal predecessors, (6127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:23,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 6127 transitions. [2022-02-15 13:34:23,538 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 6127 transitions. Word has length 24 [2022-02-15 13:34:23,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:23,538 INFO L470 AbstractCegarLoop]: Abstraction has 1872 states and 6127 transitions. [2022-02-15 13:34:23,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:23,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 6127 transitions. [2022-02-15 13:34:23,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:23,540 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:23,540 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:23,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-02-15 13:34:23,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:23,748 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:23,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1140781257, now seen corresponding path program 270 times [2022-02-15 13:34:23,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:23,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27540921] [2022-02-15 13:34:23,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:23,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:23,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:23,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:23,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27540921] [2022-02-15 13:34:23,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27540921] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:23,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110368334] [2022-02-15 13:34:23,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:34:23,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:23,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:23,979 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) [2022-02-15 13:34:23,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-02-15 13:34:24,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:34:24,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:24,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:24,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:24,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:34:24,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:24,215 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:34:24,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:24,218 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:34:24,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:24,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:24,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:24,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-02-15 13:34:25,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:25,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:34:25,044 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:25,044 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 25 treesize of output 27 [2022-02-15 13:34:25,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:25,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110368334] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:25,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:25,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:25,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52457891] [2022-02-15 13:34:25,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:25,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:25,072 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:25,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:25,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:25,073 INFO L87 Difference]: Start difference. First operand 1872 states and 6127 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:25,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:25,642 INFO L93 Difference]: Finished difference Result 2613 states and 8631 transitions. [2022-02-15 13:34:25,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:34:25,642 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:25,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:25,647 INFO L225 Difference]: With dead ends: 2613 [2022-02-15 13:34:25,647 INFO L226 Difference]: Without dead ends: 2582 [2022-02-15 13:34:25,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:34:25,647 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 170 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 451 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:25,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 309 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 714 Invalid, 0 Unknown, 451 Unchecked, 0.3s Time] [2022-02-15 13:34:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2022-02-15 13:34:25,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 1885. [2022-02-15 13:34:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1885 states, 1884 states have (on average 3.281847133757962) internal successors, (6183), 1884 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 6183 transitions. [2022-02-15 13:34:25,673 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 6183 transitions. Word has length 24 [2022-02-15 13:34:25,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:25,673 INFO L470 AbstractCegarLoop]: Abstraction has 1885 states and 6183 transitions. [2022-02-15 13:34:25,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:25,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 6183 transitions. [2022-02-15 13:34:25,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:25,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:25,675 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:25,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:25,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:25,891 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:25,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:25,891 INFO L85 PathProgramCache]: Analyzing trace with hash 229350789, now seen corresponding path program 271 times [2022-02-15 13:34:25,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:25,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188991215] [2022-02-15 13:34:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:25,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:26,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:26,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188991215] [2022-02-15 13:34:26,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188991215] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:26,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725648605] [2022-02-15 13:34:26,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:34:26,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:26,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:26,143 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) [2022-02-15 13:34:26,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-02-15 13:34:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:26,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:34:26,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:26,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:34:26,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:26,376 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:34:26,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:26,379 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:34:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:26,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:26,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:26,982 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 69 treesize of output 63 [2022-02-15 13:34:27,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:27,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:34:27,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:27,084 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 29 treesize of output 31 [2022-02-15 13:34:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:27,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725648605] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:27,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:27,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:27,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244482441] [2022-02-15 13:34:27,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:27,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:27,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:27,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:27,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:27,103 INFO L87 Difference]: Start difference. First operand 1885 states and 6183 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:27,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:27,688 INFO L93 Difference]: Finished difference Result 2682 states and 8647 transitions. [2022-02-15 13:34:27,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:34:27,689 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:27,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:27,693 INFO L225 Difference]: With dead ends: 2682 [2022-02-15 13:34:27,693 INFO L226 Difference]: Without dead ends: 2516 [2022-02-15 13:34:27,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:34:27,693 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:27,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 369 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 931 Invalid, 0 Unknown, 137 Unchecked, 0.3s Time] [2022-02-15 13:34:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2022-02-15 13:34:27,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 1913. [2022-02-15 13:34:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1912 states have (on average 3.2923640167364017) internal successors, (6295), 1912 states have internal predecessors, (6295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 6295 transitions. [2022-02-15 13:34:27,718 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 6295 transitions. Word has length 24 [2022-02-15 13:34:27,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:27,718 INFO L470 AbstractCegarLoop]: Abstraction has 1913 states and 6295 transitions. [2022-02-15 13:34:27,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:27,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 6295 transitions. [2022-02-15 13:34:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:27,721 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:27,721 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:27,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:27,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:27,936 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:27,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:27,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1439262751, now seen corresponding path program 272 times [2022-02-15 13:34:27,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:27,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067496387] [2022-02-15 13:34:27,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:27,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:34:28,096 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:28,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067496387] [2022-02-15 13:34:28,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067496387] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:28,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304177822] [2022-02-15 13:34:28,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:34:28,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:28,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:28,097 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) [2022-02-15 13:34:28,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-02-15 13:34:28,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:34:28,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:28,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:28,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:28,161 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 41 treesize of output 35 [2022-02-15 13:34:28,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:28,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:34:28,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:28,271 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:34:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:34:28,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:28,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:28,842 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 120 treesize of output 104 [2022-02-15 13:34:28,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:28,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:34:28,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:28,925 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 25 treesize of output 27 [2022-02-15 13:34:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:34:28,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304177822] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:28,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:28,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:28,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948063254] [2022-02-15 13:34:28,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:28,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:28,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:28,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:28,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:28,947 INFO L87 Difference]: Start difference. First operand 1913 states and 6295 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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) [2022-02-15 13:34:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:29,592 INFO L93 Difference]: Finished difference Result 2475 states and 8174 transitions. [2022-02-15 13:34:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:34:29,593 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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 24 [2022-02-15 13:34:29,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:29,597 INFO L225 Difference]: With dead ends: 2475 [2022-02-15 13:34:29,597 INFO L226 Difference]: Without dead ends: 2425 [2022-02-15 13:34:29,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:34:29,597 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 109 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:29,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 333 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 892 Invalid, 0 Unknown, 32 Unchecked, 0.3s Time] [2022-02-15 13:34:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-02-15 13:34:29,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1913. [2022-02-15 13:34:29,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1912 states have (on average 3.2923640167364017) internal successors, (6295), 1912 states have internal predecessors, (6295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 6295 transitions. [2022-02-15 13:34:29,621 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 6295 transitions. Word has length 24 [2022-02-15 13:34:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:29,622 INFO L470 AbstractCegarLoop]: Abstraction has 1913 states and 6295 transitions. [2022-02-15 13:34:29,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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) [2022-02-15 13:34:29,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 6295 transitions. [2022-02-15 13:34:29,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:29,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:29,624 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:29,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:29,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-02-15 13:34:29,840 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:29,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:29,840 INFO L85 PathProgramCache]: Analyzing trace with hash -933283557, now seen corresponding path program 273 times [2022-02-15 13:34:29,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:29,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070841880] [2022-02-15 13:34:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:29,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:30,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:30,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070841880] [2022-02-15 13:34:30,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070841880] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:30,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186631430] [2022-02-15 13:34:30,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:34:30,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:30,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:30,002 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) [2022-02-15 13:34:30,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-02-15 13:34:30,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:34:30,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:30,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:34:30,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:30,110 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 41 treesize of output 35 [2022-02-15 13:34:30,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:30,412 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:34:30,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:30,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-15 13:34:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:30,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:31,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:31,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-15 13:34:31,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:31,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:34:31,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:31,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:34:31,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:31,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186631430] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:31,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:31,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:31,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581674158] [2022-02-15 13:34:31,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:31,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:31,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:31,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:31,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:31,211 INFO L87 Difference]: Start difference. First operand 1913 states and 6295 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:31,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:31,704 INFO L93 Difference]: Finished difference Result 2484 states and 8133 transitions. [2022-02-15 13:34:31,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:34:31,704 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:31,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:31,708 INFO L225 Difference]: With dead ends: 2484 [2022-02-15 13:34:31,708 INFO L226 Difference]: Without dead ends: 2396 [2022-02-15 13:34:31,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:34:31,708 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 97 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:31,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 353 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 923 Invalid, 0 Unknown, 101 Unchecked, 0.4s Time] [2022-02-15 13:34:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2022-02-15 13:34:31,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 1907. [2022-02-15 13:34:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 1906 states have (on average 3.2896117523609654) internal successors, (6270), 1906 states have internal predecessors, (6270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:31,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 6270 transitions. [2022-02-15 13:34:31,732 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 6270 transitions. Word has length 24 [2022-02-15 13:34:31,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:31,732 INFO L470 AbstractCegarLoop]: Abstraction has 1907 states and 6270 transitions. [2022-02-15 13:34:31,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:31,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 6270 transitions. [2022-02-15 13:34:31,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:31,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:31,734 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:31,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:31,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-02-15 13:34:31,935 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:31,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:31,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1576019039, now seen corresponding path program 274 times [2022-02-15 13:34:31,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:31,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651058609] [2022-02-15 13:34:31,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:31,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:32,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:32,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651058609] [2022-02-15 13:34:32,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651058609] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:32,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371869771] [2022-02-15 13:34:32,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:34:32,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:32,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:32,110 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) [2022-02-15 13:34:32,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-02-15 13:34:32,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:34:32,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:32,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:34:32,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:32,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:32,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:34:32,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2022-02-15 13:34:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:32,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:33,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:33,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-15 13:34:33,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:33,118 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 35 treesize of output 37 [2022-02-15 13:34:33,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:33,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:34:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:33,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371869771] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:33,144 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:33,144 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-15 13:34:33,144 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138256526] [2022-02-15 13:34:33,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:33,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:34:33,144 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:33,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:34:33,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:34:33,144 INFO L87 Difference]: Start difference. First operand 1907 states and 6270 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2022-02-15 13:34:33,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:33,578 INFO L93 Difference]: Finished difference Result 2613 states and 8500 transitions. [2022-02-15 13:34:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:34:33,579 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 24 [2022-02-15 13:34:33,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:33,583 INFO L225 Difference]: With dead ends: 2613 [2022-02-15 13:34:33,583 INFO L226 Difference]: Without dead ends: 2476 [2022-02-15 13:34:33,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:34:33,583 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 111 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:33,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 296 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 868 Invalid, 0 Unknown, 34 Unchecked, 0.3s Time] [2022-02-15 13:34:33,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2022-02-15 13:34:33,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1920. [2022-02-15 13:34:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 1919 states have (on average 3.286086503387181) internal successors, (6306), 1919 states have internal predecessors, (6306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:33,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 6306 transitions. [2022-02-15 13:34:33,608 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 6306 transitions. Word has length 24 [2022-02-15 13:34:33,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:33,608 INFO L470 AbstractCegarLoop]: Abstraction has 1920 states and 6306 transitions. [2022-02-15 13:34:33,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2022-02-15 13:34:33,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 6306 transitions. [2022-02-15 13:34:33,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:33,610 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:33,611 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:33,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:33,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-02-15 13:34:33,814 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:33,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:33,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1863235237, now seen corresponding path program 275 times [2022-02-15 13:34:33,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:33,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895624] [2022-02-15 13:34:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:33,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:33,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:33,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895624] [2022-02-15 13:34:33,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895624] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:33,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609157613] [2022-02-15 13:34:33,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:34:33,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:33,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:33,956 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) [2022-02-15 13:34:33,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-02-15 13:34:33,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:34:33,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:33,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:33,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:34,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:34,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:34:34,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:34,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:34:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:34,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:34,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:34,745 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 51 treesize of output 48 [2022-02-15 13:34:34,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:34,804 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 31 treesize of output 33 [2022-02-15 13:34:34,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:34,808 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 25 treesize of output 27 [2022-02-15 13:34:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:34,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609157613] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:34,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:34,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:34,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535882266] [2022-02-15 13:34:34,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:34,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:34,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:34,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:34,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:34,826 INFO L87 Difference]: Start difference. First operand 1920 states and 6306 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:35,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:35,425 INFO L93 Difference]: Finished difference Result 2533 states and 8125 transitions. [2022-02-15 13:34:35,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:34:35,426 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:35,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:35,430 INFO L225 Difference]: With dead ends: 2533 [2022-02-15 13:34:35,430 INFO L226 Difference]: Without dead ends: 2475 [2022-02-15 13:34:35,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:34:35,431 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 101 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:35,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 359 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 793 Invalid, 0 Unknown, 166 Unchecked, 0.3s Time] [2022-02-15 13:34:35,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2022-02-15 13:34:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 1922. [2022-02-15 13:34:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1921 states have (on average 3.2852680895366997) internal successors, (6311), 1921 states have internal predecessors, (6311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:35,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 6311 transitions. [2022-02-15 13:34:35,456 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 6311 transitions. Word has length 24 [2022-02-15 13:34:35,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:35,456 INFO L470 AbstractCegarLoop]: Abstraction has 1922 states and 6311 transitions. [2022-02-15 13:34:35,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 6311 transitions. [2022-02-15 13:34:35,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:35,459 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:35,459 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:35,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:35,674 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,SelfDestructingSolverStorable290 [2022-02-15 13:34:35,675 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:35,675 INFO L85 PathProgramCache]: Analyzing trace with hash -621535223, now seen corresponding path program 276 times [2022-02-15 13:34:35,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:35,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624487028] [2022-02-15 13:34:35,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:35,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:35,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:35,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624487028] [2022-02-15 13:34:35,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624487028] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:35,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596346205] [2022-02-15 13:34:35,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:34:35,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:35,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:35,795 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) [2022-02-15 13:34:35,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-02-15 13:34:35,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:34:35,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:35,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:35,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:35,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:35,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:34:36,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:36,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 33 treesize of output 27 [2022-02-15 13:34:36,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-02-15 13:34:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:36,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:36,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:36,399 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 120 treesize of output 104 [2022-02-15 13:34:36,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:36,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:34:36,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:36,498 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 25 treesize of output 27 [2022-02-15 13:34:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:36,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596346205] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:36,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:36,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:36,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73940031] [2022-02-15 13:34:36,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:36,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:36,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:36,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:36,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:36,518 INFO L87 Difference]: Start difference. First operand 1922 states and 6311 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:37,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:37,459 INFO L93 Difference]: Finished difference Result 2934 states and 9297 transitions. [2022-02-15 13:34:37,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 13:34:37,459 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:37,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:37,464 INFO L225 Difference]: With dead ends: 2934 [2022-02-15 13:34:37,464 INFO L226 Difference]: Without dead ends: 2876 [2022-02-15 13:34:37,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:34:37,464 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 145 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:37,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 450 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1015 Invalid, 0 Unknown, 382 Unchecked, 0.4s Time] [2022-02-15 13:34:37,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2022-02-15 13:34:37,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 1922. [2022-02-15 13:34:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1921 states have (on average 3.2852680895366997) internal successors, (6311), 1921 states have internal predecessors, (6311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:37,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 6311 transitions. [2022-02-15 13:34:37,492 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 6311 transitions. Word has length 24 [2022-02-15 13:34:37,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:37,492 INFO L470 AbstractCegarLoop]: Abstraction has 1922 states and 6311 transitions. [2022-02-15 13:34:37,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:37,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 6311 transitions. [2022-02-15 13:34:37,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:37,494 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:37,494 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:37,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:37,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:37,710 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:37,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:37,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1669178643, now seen corresponding path program 277 times [2022-02-15 13:34:37,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:37,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928651757] [2022-02-15 13:34:37,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:37,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:37,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:37,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928651757] [2022-02-15 13:34:37,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928651757] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:37,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121173477] [2022-02-15 13:34:37,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:34:37,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:37,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:37,915 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) [2022-02-15 13:34:37,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-02-15 13:34:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:37,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:37,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:38,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:38,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:34:38,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:38,167 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:34:38,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:38,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:34:38,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:38,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:38,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:38,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2022-02-15 13:34:38,909 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:38,909 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 125 treesize of output 109 [2022-02-15 13:34:38,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:38,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 85 [2022-02-15 13:34:38,957 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:38,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121173477] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:38,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:38,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:34:38,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798400924] [2022-02-15 13:34:38,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:38,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:34:38,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:38,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:34:38,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:34:38,958 INFO L87 Difference]: Start difference. First operand 1922 states and 6311 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) [2022-02-15 13:34:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:39,141 INFO L93 Difference]: Finished difference Result 2073 states and 6738 transitions. [2022-02-15 13:34:39,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:34:39,141 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 24 [2022-02-15 13:34:39,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:39,144 INFO L225 Difference]: With dead ends: 2073 [2022-02-15 13:34:39,144 INFO L226 Difference]: Without dead ends: 2007 [2022-02-15 13:34:39,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:39,144 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 56 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:39,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 181 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 489 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-02-15 13:34:39,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2022-02-15 13:34:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1925. [2022-02-15 13:34:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1925 states, 1924 states have (on average 3.286902286902287) internal successors, (6324), 1924 states have internal predecessors, (6324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 6324 transitions. [2022-02-15 13:34:39,165 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 6324 transitions. Word has length 24 [2022-02-15 13:34:39,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:39,165 INFO L470 AbstractCegarLoop]: Abstraction has 1925 states and 6324 transitions. [2022-02-15 13:34:39,165 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) [2022-02-15 13:34:39,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 6324 transitions. [2022-02-15 13:34:39,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:39,168 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:39,168 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:39,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-02-15 13:34:39,383 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,SelfDestructingSolverStorable292 [2022-02-15 13:34:39,383 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:39,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:39,384 INFO L85 PathProgramCache]: Analyzing trace with hash -343886093, now seen corresponding path program 278 times [2022-02-15 13:34:39,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:39,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549536779] [2022-02-15 13:34:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:39,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:39,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:39,510 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:39,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549536779] [2022-02-15 13:34:39,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549536779] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:39,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059256038] [2022-02-15 13:34:39,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:34:39,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:39,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:39,511 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) [2022-02-15 13:34:39,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-02-15 13:34:39,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:34:39,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:39,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:39,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:39,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:39,623 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:34:39,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:39,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-15 13:34:39,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:39,739 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:34:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:39,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:40,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:40,123 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 102 treesize of output 96 [2022-02-15 13:34:40,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:40,295 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 123 treesize of output 107 [2022-02-15 13:34:40,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:40,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-02-15 13:34:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:40,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059256038] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:40,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:40,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:40,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471023033] [2022-02-15 13:34:40,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:40,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:40,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:40,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:40,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:40,337 INFO L87 Difference]: Start difference. First operand 1925 states and 6324 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:40,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:40,608 INFO L93 Difference]: Finished difference Result 2054 states and 6701 transitions. [2022-02-15 13:34:40,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:34:40,608 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:40,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:40,612 INFO L225 Difference]: With dead ends: 2054 [2022-02-15 13:34:40,612 INFO L226 Difference]: Without dead ends: 2015 [2022-02-15 13:34:40,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:34:40,612 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:40,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 253 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 613 Invalid, 0 Unknown, 186 Unchecked, 0.2s Time] [2022-02-15 13:34:40,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2022-02-15 13:34:40,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1929. [2022-02-15 13:34:40,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1928 states have (on average 3.288900414937759) internal successors, (6341), 1928 states have internal predecessors, (6341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:40,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 6341 transitions. [2022-02-15 13:34:40,634 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 6341 transitions. Word has length 24 [2022-02-15 13:34:40,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:40,634 INFO L470 AbstractCegarLoop]: Abstraction has 1929 states and 6341 transitions. [2022-02-15 13:34:40,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:40,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 6341 transitions. [2022-02-15 13:34:40,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:40,636 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:40,637 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:40,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-02-15 13:34:40,839 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,SelfDestructingSolverStorable293 [2022-02-15 13:34:40,839 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:40,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:40,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1977729487, now seen corresponding path program 279 times [2022-02-15 13:34:40,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:40,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86575456] [2022-02-15 13:34:40,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:40,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:41,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:41,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:41,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86575456] [2022-02-15 13:34:41,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86575456] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:41,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759536488] [2022-02-15 13:34:41,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:34:41,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:41,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:41,131 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) [2022-02-15 13:34:41,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-02-15 13:34:41,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:34:41,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:41,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:41,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:41,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:41,243 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:34:41,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:41,300 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 13:34:41,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:41,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:34:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:41,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:42,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:42,033 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 130 treesize of output 120 [2022-02-15 13:34:42,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:42,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 54 [2022-02-15 13:34:42,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:42,297 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 45 treesize of output 42 [2022-02-15 13:34:42,348 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:42,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759536488] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:42,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:42,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:42,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000048708] [2022-02-15 13:34:42,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:42,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:42,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:42,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:42,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:42,349 INFO L87 Difference]: Start difference. First operand 1929 states and 6341 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:43,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:43,323 INFO L93 Difference]: Finished difference Result 2139 states and 6887 transitions. [2022-02-15 13:34:43,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:34:43,323 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:43,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:43,326 INFO L225 Difference]: With dead ends: 2139 [2022-02-15 13:34:43,326 INFO L226 Difference]: Without dead ends: 2019 [2022-02-15 13:34:43,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:34:43,327 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 118 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:43,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 258 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 767 Invalid, 0 Unknown, 264 Unchecked, 0.3s Time] [2022-02-15 13:34:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2022-02-15 13:34:43,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1929. [2022-02-15 13:34:43,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1928 states have (on average 3.288900414937759) internal successors, (6341), 1928 states have internal predecessors, (6341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:43,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 6341 transitions. [2022-02-15 13:34:43,352 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 6341 transitions. Word has length 24 [2022-02-15 13:34:43,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:43,352 INFO L470 AbstractCegarLoop]: Abstraction has 1929 states and 6341 transitions. [2022-02-15 13:34:43,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:43,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 6341 transitions. [2022-02-15 13:34:43,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:43,354 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:43,354 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:43,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:43,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:43,555 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:43,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:43,555 INFO L85 PathProgramCache]: Analyzing trace with hash -55237457, now seen corresponding path program 280 times [2022-02-15 13:34:43,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:43,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91865247] [2022-02-15 13:34:43,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:43,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:43,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:43,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91865247] [2022-02-15 13:34:43,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91865247] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:43,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083937132] [2022-02-15 13:34:43,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:34:43,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:43,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:43,768 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) [2022-02-15 13:34:43,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-02-15 13:34:43,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:34:43,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:43,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:43,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:43,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:43,908 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:34:44,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:44,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:34:44,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:44,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:34:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:44,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:44,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:44,593 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 100 treesize of output 94 [2022-02-15 13:34:44,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:44,930 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 129 treesize of output 113 [2022-02-15 13:34:44,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:44,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 89 [2022-02-15 13:34:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:45,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083937132] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:45,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:45,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:45,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806760224] [2022-02-15 13:34:45,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:45,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:45,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:45,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:45,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:45,026 INFO L87 Difference]: Start difference. First operand 1929 states and 6341 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:45,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:45,333 INFO L93 Difference]: Finished difference Result 2054 states and 6697 transitions. [2022-02-15 13:34:45,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:34:45,334 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:45,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:45,338 INFO L225 Difference]: With dead ends: 2054 [2022-02-15 13:34:45,338 INFO L226 Difference]: Without dead ends: 2015 [2022-02-15 13:34:45,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:34:45,338 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:45,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 236 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 496 Invalid, 0 Unknown, 310 Unchecked, 0.2s Time] [2022-02-15 13:34:45,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2022-02-15 13:34:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1931. [2022-02-15 13:34:45,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 3.288082901554404) internal successors, (6346), 1930 states have internal predecessors, (6346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:45,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 6346 transitions. [2022-02-15 13:34:45,363 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 6346 transitions. Word has length 24 [2022-02-15 13:34:45,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:45,363 INFO L470 AbstractCegarLoop]: Abstraction has 1931 states and 6346 transitions. [2022-02-15 13:34:45,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:45,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 6346 transitions. [2022-02-15 13:34:45,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:45,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:45,366 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:45,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-02-15 13:34:45,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:45,582 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:45,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1153662861, now seen corresponding path program 281 times [2022-02-15 13:34:45,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:45,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243631151] [2022-02-15 13:34:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:45,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:45,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:45,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:45,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:45,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243631151] [2022-02-15 13:34:45,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243631151] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:45,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485986152] [2022-02-15 13:34:45,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:34:45,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:45,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:45,839 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) [2022-02-15 13:34:45,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-02-15 13:34:45,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:34:45,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:45,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:45,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:45,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:45,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:34:46,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:46,044 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 13:34:46,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:46,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:34:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:46,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:46,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:46,603 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 132 treesize of output 122 [2022-02-15 13:34:46,819 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:46,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 54 [2022-02-15 13:34:46,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:46,824 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 45 treesize of output 42 [2022-02-15 13:34:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:46,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485986152] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:46,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:46,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:46,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479813746] [2022-02-15 13:34:46,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:46,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:46,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:46,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:46,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:46,856 INFO L87 Difference]: Start difference. First operand 1931 states and 6346 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:47,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:47,477 INFO L93 Difference]: Finished difference Result 2116 states and 6803 transitions. [2022-02-15 13:34:47,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:34:47,478 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:47,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:47,481 INFO L225 Difference]: With dead ends: 2116 [2022-02-15 13:34:47,481 INFO L226 Difference]: Without dead ends: 2023 [2022-02-15 13:34:47,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:34:47,481 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 80 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:47,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 263 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 653 Invalid, 0 Unknown, 152 Unchecked, 0.3s Time] [2022-02-15 13:34:47,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2022-02-15 13:34:47,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1930. [2022-02-15 13:34:47,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 3.2871954380508037) internal successors, (6341), 1929 states have internal predecessors, (6341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:47,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 6341 transitions. [2022-02-15 13:34:47,503 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 6341 transitions. Word has length 24 [2022-02-15 13:34:47,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:47,503 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 6341 transitions. [2022-02-15 13:34:47,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:47,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 6341 transitions. [2022-02-15 13:34:47,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:47,505 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:47,505 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:47,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:47,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:47,719 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:47,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1911963491, now seen corresponding path program 282 times [2022-02-15 13:34:47,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:47,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051541909] [2022-02-15 13:34:47,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:47,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:47,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:47,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051541909] [2022-02-15 13:34:47,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051541909] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:47,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940269550] [2022-02-15 13:34:47,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:34:47,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:47,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:47,982 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) [2022-02-15 13:34:47,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-02-15 13:34:48,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:34:48,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:48,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:48,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:48,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:34:48,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:48,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 37 [2022-02-15 13:34:48,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:48,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:34:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:48,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:48,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:48,904 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2022-02-15 13:34:49,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:49,130 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 127 treesize of output 111 [2022-02-15 13:34:49,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:49,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 87 [2022-02-15 13:34:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:49,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940269550] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:49,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:49,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:49,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942746170] [2022-02-15 13:34:49,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:49,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:49,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:49,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:49,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:49,200 INFO L87 Difference]: Start difference. First operand 1930 states and 6341 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:49,570 INFO L93 Difference]: Finished difference Result 2080 states and 6758 transitions. [2022-02-15 13:34:49,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:34:49,570 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:49,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:49,574 INFO L225 Difference]: With dead ends: 2080 [2022-02-15 13:34:49,574 INFO L226 Difference]: Without dead ends: 2014 [2022-02-15 13:34:49,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:34:49,574 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:49,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 196 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 693 Invalid, 0 Unknown, 4 Unchecked, 0.3s Time] [2022-02-15 13:34:49,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2022-02-15 13:34:49,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1937. [2022-02-15 13:34:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 3.2851239669421486) internal successors, (6360), 1936 states have internal predecessors, (6360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 6360 transitions. [2022-02-15 13:34:49,599 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 6360 transitions. Word has length 24 [2022-02-15 13:34:49,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:49,599 INFO L470 AbstractCegarLoop]: Abstraction has 1937 states and 6360 transitions. [2022-02-15 13:34:49,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:49,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 6360 transitions. [2022-02-15 13:34:49,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:49,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:49,602 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:49,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:49,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable297 [2022-02-15 13:34:49,811 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:49,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2027484205, now seen corresponding path program 283 times [2022-02-15 13:34:49,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:49,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962740233] [2022-02-15 13:34:49,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:49,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:49,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:50,039 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:50,039 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:50,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962740233] [2022-02-15 13:34:50,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962740233] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:50,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291605089] [2022-02-15 13:34:50,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:34:50,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:50,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:50,040 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) [2022-02-15 13:34:50,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-02-15 13:34:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:50,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:50,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:50,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:50,194 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:34:50,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:50,359 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:34:50,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:50,362 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:34:50,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:50,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:51,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:51,071 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 102 treesize of output 96 [2022-02-15 13:34:51,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:51,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-02-15 13:34:51,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:51,233 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 102 treesize of output 86 [2022-02-15 13:34:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:51,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291605089] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:51,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:51,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:34:51,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512295903] [2022-02-15 13:34:51,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:51,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:34:51,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:51,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:34:51,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:34:51,300 INFO L87 Difference]: Start difference. First operand 1937 states and 6360 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) [2022-02-15 13:34:51,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:51,511 INFO L93 Difference]: Finished difference Result 2094 states and 6830 transitions. [2022-02-15 13:34:51,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:34:51,512 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 24 [2022-02-15 13:34:51,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:51,515 INFO L225 Difference]: With dead ends: 2094 [2022-02-15 13:34:51,515 INFO L226 Difference]: Without dead ends: 2036 [2022-02-15 13:34:51,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:34:51,515 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:51,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 156 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 481 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2022-02-15 13:34:51,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2022-02-15 13:34:51,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1945. [2022-02-15 13:34:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1945 states, 1944 states have (on average 3.288065843621399) internal successors, (6392), 1944 states have internal predecessors, (6392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:51,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 6392 transitions. [2022-02-15 13:34:51,559 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 6392 transitions. Word has length 24 [2022-02-15 13:34:51,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:51,559 INFO L470 AbstractCegarLoop]: Abstraction has 1945 states and 6392 transitions. [2022-02-15 13:34:51,559 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) [2022-02-15 13:34:51,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 6392 transitions. [2022-02-15 13:34:51,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:51,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:51,561 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:51,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:51,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-02-15 13:34:51,767 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:51,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:51,767 INFO L85 PathProgramCache]: Analyzing trace with hash 718918917, now seen corresponding path program 284 times [2022-02-15 13:34:51,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:51,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607884580] [2022-02-15 13:34:51,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:51,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:51,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:51,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607884580] [2022-02-15 13:34:51,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607884580] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:51,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449103853] [2022-02-15 13:34:51,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:34:51,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:51,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:51,995 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) [2022-02-15 13:34:51,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-02-15 13:34:52,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:34:52,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:52,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:52,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:52,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:34:52,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:52,326 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-02-15 13:34:52,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:52,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:34:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:52,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:52,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:52,784 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 100 treesize of output 94 [2022-02-15 13:34:52,925 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:52,925 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 123 treesize of output 107 [2022-02-15 13:34:52,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:52,943 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 99 treesize of output 83 [2022-02-15 13:34:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:52,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449103853] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:52,994 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:52,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:52,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164318467] [2022-02-15 13:34:52,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:52,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:52,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:52,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:52,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:52,995 INFO L87 Difference]: Start difference. First operand 1945 states and 6392 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:53,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:53,242 INFO L93 Difference]: Finished difference Result 2137 states and 6935 transitions. [2022-02-15 13:34:53,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:34:53,242 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:53,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:53,245 INFO L225 Difference]: With dead ends: 2137 [2022-02-15 13:34:53,246 INFO L226 Difference]: Without dead ends: 2075 [2022-02-15 13:34:53,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:53,246 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 89 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:53,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 256 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 717 Invalid, 0 Unknown, 223 Unchecked, 0.2s Time] [2022-02-15 13:34:53,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2022-02-15 13:34:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 1938. [2022-02-15 13:34:53,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 3.2854930304594734) internal successors, (6364), 1937 states have internal predecessors, (6364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:53,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 6364 transitions. [2022-02-15 13:34:53,271 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 6364 transitions. Word has length 24 [2022-02-15 13:34:53,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:53,271 INFO L470 AbstractCegarLoop]: Abstraction has 1938 states and 6364 transitions. [2022-02-15 13:34:53,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:53,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 6364 transitions. [2022-02-15 13:34:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:53,273 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:53,273 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:53,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:53,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-02-15 13:34:53,488 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:53,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:53,488 INFO L85 PathProgramCache]: Analyzing trace with hash 234516147, now seen corresponding path program 285 times [2022-02-15 13:34:53,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:53,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309639428] [2022-02-15 13:34:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:53,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:53,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:53,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:53,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309639428] [2022-02-15 13:34:53,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309639428] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:53,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095764638] [2022-02-15 13:34:53,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:34:53,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:53,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:53,644 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) [2022-02-15 13:34:53,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-02-15 13:34:53,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 13:34:53,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:53,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:53,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:53,747 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 41 treesize of output 35 [2022-02-15 13:34:53,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:53,902 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2022-02-15 13:34:53,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:53,904 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 47 treesize of output 35 [2022-02-15 13:34:54,024 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:54,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:54,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:54,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-02-15 13:34:54,674 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:54,675 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-02-15 13:34:54,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:54,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-02-15 13:34:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:54,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095764638] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:54,753 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:54,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:54,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036427683] [2022-02-15 13:34:54,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:54,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:54,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:54,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:54,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:54,753 INFO L87 Difference]: Start difference. First operand 1938 states and 6364 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:55,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:55,002 INFO L93 Difference]: Finished difference Result 2054 states and 6681 transitions. [2022-02-15 13:34:55,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:34:55,002 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:55,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:55,006 INFO L225 Difference]: With dead ends: 2054 [2022-02-15 13:34:55,006 INFO L226 Difference]: Without dead ends: 2019 [2022-02-15 13:34:55,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:34:55,006 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 39 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:55,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 251 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 461 Invalid, 0 Unknown, 173 Unchecked, 0.2s Time] [2022-02-15 13:34:55,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2022-02-15 13:34:55,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1942. [2022-02-15 13:34:55,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 3.2838742916022667) internal successors, (6374), 1941 states have internal predecessors, (6374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 6374 transitions. [2022-02-15 13:34:55,028 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 6374 transitions. Word has length 24 [2022-02-15 13:34:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:55,028 INFO L470 AbstractCegarLoop]: Abstraction has 1942 states and 6374 transitions. [2022-02-15 13:34:55,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 6374 transitions. [2022-02-15 13:34:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:55,030 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:55,030 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:55,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:55,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-02-15 13:34:55,243 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:55,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:55,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1861651055, now seen corresponding path program 286 times [2022-02-15 13:34:55,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:55,243 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121208697] [2022-02-15 13:34:55,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:55,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:55,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:55,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121208697] [2022-02-15 13:34:55,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121208697] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:55,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618991127] [2022-02-15 13:34:55,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:34:55,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:55,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:55,421 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) [2022-02-15 13:34:55,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-02-15 13:34:55,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:34:55,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:55,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:55,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:55,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:34:55,597 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 43 treesize of output 37 [2022-02-15 13:34:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:55,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:56,114 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:56,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-02-15 13:34:56,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:56,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-02-15 13:34:56,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:56,302 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 99 treesize of output 83 [2022-02-15 13:34:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:56,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618991127] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:56,359 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:56,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:56,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318273024] [2022-02-15 13:34:56,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:56,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:56,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:56,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:56,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:56,360 INFO L87 Difference]: Start difference. First operand 1942 states and 6374 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:57,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:57,159 INFO L93 Difference]: Finished difference Result 2359 states and 7528 transitions. [2022-02-15 13:34:57,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:34:57,159 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:57,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:57,163 INFO L225 Difference]: With dead ends: 2359 [2022-02-15 13:34:57,163 INFO L226 Difference]: Without dead ends: 2262 [2022-02-15 13:34:57,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:34:57,163 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 117 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:57,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 254 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:34:57,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-02-15 13:34:57,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1948. [2022-02-15 13:34:57,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 3.2824858757062145) internal successors, (6391), 1947 states have internal predecessors, (6391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:57,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 6391 transitions. [2022-02-15 13:34:57,187 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 6391 transitions. Word has length 24 [2022-02-15 13:34:57,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:57,187 INFO L470 AbstractCegarLoop]: Abstraction has 1948 states and 6391 transitions. [2022-02-15 13:34:57,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:57,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 6391 transitions. [2022-02-15 13:34:57,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:57,190 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:57,190 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:57,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-02-15 13:34:57,392 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,SelfDestructingSolverStorable301 [2022-02-15 13:34:57,392 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:57,392 INFO L85 PathProgramCache]: Analyzing trace with hash 775506995, now seen corresponding path program 287 times [2022-02-15 13:34:57,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:57,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466850158] [2022-02-15 13:34:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:57,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:34:57,601 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:57,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466850158] [2022-02-15 13:34:57,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466850158] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:57,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741497749] [2022-02-15 13:34:57,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:34:57,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:57,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:57,602 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) [2022-02-15 13:34:57,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-02-15 13:34:57,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:34:57,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:57,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:34:57,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:57,677 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 41 treesize of output 35 [2022-02-15 13:34:57,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:57,808 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:34:57,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:57,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:34:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:34:57,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:58,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:58,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 72 [2022-02-15 13:34:58,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:58,266 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 58 treesize of output 55 [2022-02-15 13:34:58,270 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:58,270 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 46 treesize of output 43 [2022-02-15 13:34:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:34:58,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741497749] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:58,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:58,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:34:58,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650190850] [2022-02-15 13:34:58,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:58,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:34:58,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:58,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:34:58,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:34:58,312 INFO L87 Difference]: Start difference. First operand 1948 states and 6391 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:58,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:34:58,625 INFO L93 Difference]: Finished difference Result 2090 states and 6816 transitions. [2022-02-15 13:34:58,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:34:58,625 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:34:58,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:34:58,629 INFO L225 Difference]: With dead ends: 2090 [2022-02-15 13:34:58,629 INFO L226 Difference]: Without dead ends: 2071 [2022-02-15 13:34:58,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:34:58,629 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:34:58,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 251 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 579 Invalid, 0 Unknown, 277 Unchecked, 0.2s Time] [2022-02-15 13:34:58,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2022-02-15 13:34:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1938. [2022-02-15 13:34:58,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 3.2854930304594734) internal successors, (6364), 1937 states have internal predecessors, (6364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:34:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 6364 transitions. [2022-02-15 13:34:58,653 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 6364 transitions. Word has length 24 [2022-02-15 13:34:58,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:34:58,653 INFO L470 AbstractCegarLoop]: Abstraction has 1938 states and 6364 transitions. [2022-02-15 13:34:58,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:34:58,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 6364 transitions. [2022-02-15 13:34:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:34:58,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:34:58,656 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:34:58,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Forceful destruction successful, exit code 0 [2022-02-15 13:34:58,871 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,SelfDestructingSolverStorable302 [2022-02-15 13:34:58,871 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:34:58,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:34:58,871 INFO L85 PathProgramCache]: Analyzing trace with hash -784522235, now seen corresponding path program 288 times [2022-02-15 13:34:58,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:34:58,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295953869] [2022-02-15 13:34:58,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:34:58,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:34:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:34:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:59,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:34:59,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295953869] [2022-02-15 13:34:59,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295953869] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:34:59,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793347110] [2022-02-15 13:34:59,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:34:59,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:34:59,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:34:59,058 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) [2022-02-15 13:34:59,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-02-15 13:34:59,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:34:59,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:34:59,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2022-02-15 13:34:59,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:34:59,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:59,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 29 [2022-02-15 13:34:59,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:59,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:34:59,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:34:59,275 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:34:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:59,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:34:59,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:59,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-15 13:34:59,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:59,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-02-15 13:34:59,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:34:59,883 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 102 treesize of output 86 [2022-02-15 13:34:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:34:59,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793347110] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:34:59,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:34:59,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 26 [2022-02-15 13:34:59,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730127347] [2022-02-15 13:34:59,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:34:59,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:34:59,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:34:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:34:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:34:59,952 INFO L87 Difference]: Start difference. First operand 1938 states and 6364 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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) [2022-02-15 13:35:00,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:00,331 INFO L93 Difference]: Finished difference Result 2093 states and 6819 transitions. [2022-02-15 13:35:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:35:00,332 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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 24 [2022-02-15 13:35:00,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:00,335 INFO L225 Difference]: With dead ends: 2093 [2022-02-15 13:35:00,335 INFO L226 Difference]: Without dead ends: 2054 [2022-02-15 13:35:00,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 29 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:35:00,335 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 65 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 214 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:00,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 239 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 589 Invalid, 0 Unknown, 214 Unchecked, 0.3s Time] [2022-02-15 13:35:00,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2022-02-15 13:35:00,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1940. [2022-02-15 13:35:00,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1939 states have (on average 3.2846828261990715) internal successors, (6369), 1939 states have internal predecessors, (6369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:00,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 6369 transitions. [2022-02-15 13:35:00,357 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 6369 transitions. Word has length 24 [2022-02-15 13:35:00,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:00,357 INFO L470 AbstractCegarLoop]: Abstraction has 1940 states and 6369 transitions. [2022-02-15 13:35:00,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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) [2022-02-15 13:35:00,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 6369 transitions. [2022-02-15 13:35:00,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:00,360 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:00,360 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:00,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:00,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:00,576 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:00,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:00,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1882947639, now seen corresponding path program 289 times [2022-02-15 13:35:00,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:00,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530207047] [2022-02-15 13:35:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:00,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:00,787 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:00,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530207047] [2022-02-15 13:35:00,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530207047] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:00,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407798340] [2022-02-15 13:35:00,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:35:00,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:00,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:00,788 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) [2022-02-15 13:35:00,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-02-15 13:35:00,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:00,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:00,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:00,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:00,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 29 [2022-02-15 13:35:00,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:00,993 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 13:35:00,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:00,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:35:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:01,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:01,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:01,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-15 13:35:01,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:01,800 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 129 treesize of output 113 [2022-02-15 13:35:01,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:01,804 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 105 treesize of output 89 [2022-02-15 13:35:01,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:01,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407798340] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:01,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:01,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:01,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844156203] [2022-02-15 13:35:01,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:01,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:01,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:01,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:01,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:01,851 INFO L87 Difference]: Start difference. First operand 1940 states and 6369 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:02,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:02,188 INFO L93 Difference]: Finished difference Result 2088 states and 6798 transitions. [2022-02-15 13:35:02,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:35:02,188 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:35:02,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:02,191 INFO L225 Difference]: With dead ends: 2088 [2022-02-15 13:35:02,191 INFO L226 Difference]: Without dead ends: 2053 [2022-02-15 13:35:02,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:35:02,191 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:02,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 282 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 638 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-02-15 13:35:02,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2022-02-15 13:35:02,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1944. [2022-02-15 13:35:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1943 states have (on average 3.285126093669583) internal successors, (6383), 1943 states have internal predecessors, (6383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:02,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 6383 transitions. [2022-02-15 13:35:02,212 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 6383 transitions. Word has length 24 [2022-02-15 13:35:02,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:02,212 INFO L470 AbstractCegarLoop]: Abstraction has 1944 states and 6383 transitions. [2022-02-15 13:35:02,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:02,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 6383 transitions. [2022-02-15 13:35:02,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:02,215 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:02,215 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:02,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-02-15 13:35:02,430 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,SelfDestructingSolverStorable304 [2022-02-15 13:35:02,430 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:02,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:02,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1655808971, now seen corresponding path program 290 times [2022-02-15 13:35:02,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:02,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850846414] [2022-02-15 13:35:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:02,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:02,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:02,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850846414] [2022-02-15 13:35:02,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850846414] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:02,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677327079] [2022-02-15 13:35:02,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:35:02,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:02,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:02,627 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) [2022-02-15 13:35:02,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-02-15 13:35:02,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:35:02,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:02,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:02,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:02,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:02,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:02,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 37 [2022-02-15 13:35:02,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:02,849 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:35:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:03,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:03,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:03,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-02-15 13:35:03,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:03,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-02-15 13:35:03,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:03,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-02-15 13:35:03,910 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:03,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677327079] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:03,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:03,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:03,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322721402] [2022-02-15 13:35:03,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:03,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:03,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:03,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:03,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:03,911 INFO L87 Difference]: Start difference. First operand 1944 states and 6383 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:04,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:04,249 INFO L93 Difference]: Finished difference Result 2118 states and 6870 transitions. [2022-02-15 13:35:04,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:35:04,249 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:35:04,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:04,252 INFO L225 Difference]: With dead ends: 2118 [2022-02-15 13:35:04,252 INFO L226 Difference]: Without dead ends: 2052 [2022-02-15 13:35:04,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:35:04,252 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 86 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:04,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 221 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 614 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-02-15 13:35:04,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2022-02-15 13:35:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1946. [2022-02-15 13:35:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1945 states have (on average 3.2858611825192803) internal successors, (6391), 1945 states have internal predecessors, (6391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:04,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 6391 transitions. [2022-02-15 13:35:04,275 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 6391 transitions. Word has length 24 [2022-02-15 13:35:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:04,275 INFO L470 AbstractCegarLoop]: Abstraction has 1946 states and 6391 transitions. [2022-02-15 13:35:04,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 6391 transitions. [2022-02-15 13:35:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:04,277 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:04,277 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:04,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-02-15 13:35:04,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-02-15 13:35:04,493 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:04,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:04,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1540288257, now seen corresponding path program 291 times [2022-02-15 13:35:04,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:04,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417783536] [2022-02-15 13:35:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:04,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:04,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:04,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:04,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417783536] [2022-02-15 13:35:04,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417783536] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:04,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704941557] [2022-02-15 13:35:04,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:35:04,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:04,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:04,700 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) [2022-02-15 13:35:04,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-02-15 13:35:04,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-02-15 13:35:04,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:04,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:04,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:04,778 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 41 treesize of output 35 [2022-02-15 13:35:04,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:04,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:35:04,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:04,900 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:35:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:05,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:05,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:05,560 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 47 treesize of output 47 [2022-02-15 13:35:05,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:05,633 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 47 treesize of output 46 [2022-02-15 13:35:05,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:05,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-02-15 13:35:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:05,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704941557] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:05,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:05,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:05,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321152661] [2022-02-15 13:35:05,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:05,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:05,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:05,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:05,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:05,667 INFO L87 Difference]: Start difference. First operand 1946 states and 6391 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:05,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:05,992 INFO L93 Difference]: Finished difference Result 2098 states and 6841 transitions. [2022-02-15 13:35:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:35:05,993 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:35:05,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:05,996 INFO L225 Difference]: With dead ends: 2098 [2022-02-15 13:35:05,997 INFO L226 Difference]: Without dead ends: 2067 [2022-02-15 13:35:05,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:35:05,997 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 111 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:05,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 245 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 659 Invalid, 0 Unknown, 301 Unchecked, 0.2s Time] [2022-02-15 13:35:05,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2022-02-15 13:35:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1962. [2022-02-15 13:35:06,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1962 states, 1961 states have (on average 3.287098419173891) internal successors, (6446), 1961 states have internal predecessors, (6446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:06,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1962 states to 1962 states and 6446 transitions. [2022-02-15 13:35:06,021 INFO L78 Accepts]: Start accepts. Automaton has 1962 states and 6446 transitions. Word has length 24 [2022-02-15 13:35:06,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:06,021 INFO L470 AbstractCegarLoop]: Abstraction has 1962 states and 6446 transitions. [2022-02-15 13:35:06,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:06,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1962 states and 6446 transitions. [2022-02-15 13:35:06,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:06,024 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:06,024 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:06,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-02-15 13:35:06,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:06,239 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:06,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:06,240 INFO L85 PathProgramCache]: Analyzing trace with hash -8275917, now seen corresponding path program 292 times [2022-02-15 13:35:06,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:06,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661267149] [2022-02-15 13:35:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:06,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:06,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:06,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661267149] [2022-02-15 13:35:06,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661267149] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:06,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648750200] [2022-02-15 13:35:06,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:35:06,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:06,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:06,343 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) [2022-02-15 13:35:06,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-02-15 13:35:06,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:35:06,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:06,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:06,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:06,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:06,418 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:06,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:06,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 29 [2022-02-15 13:35:06,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:06,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 8 [2022-02-15 13:35:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:06,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:07,274 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:07,275 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 87 treesize of output 81 [2022-02-15 13:35:07,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:07,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-02-15 13:35:07,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:07,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-02-15 13:35:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:07,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648750200] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:07,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:07,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:07,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402061255] [2022-02-15 13:35:07,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:07,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:07,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:07,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:07,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:07,424 INFO L87 Difference]: Start difference. First operand 1962 states and 6446 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:07,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:07,716 INFO L93 Difference]: Finished difference Result 2085 states and 6797 transitions. [2022-02-15 13:35:07,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:35:07,716 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:35:07,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:07,720 INFO L225 Difference]: With dead ends: 2085 [2022-02-15 13:35:07,720 INFO L226 Difference]: Without dead ends: 2054 [2022-02-15 13:35:07,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:35:07,720 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:07,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 253 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 667 Invalid, 0 Unknown, 112 Unchecked, 0.2s Time] [2022-02-15 13:35:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2022-02-15 13:35:07,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1971. [2022-02-15 13:35:07,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1970 states have (on average 3.2883248730964465) internal successors, (6478), 1970 states have internal predecessors, (6478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:07,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 6478 transitions. [2022-02-15 13:35:07,742 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 6478 transitions. Word has length 24 [2022-02-15 13:35:07,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:07,742 INFO L470 AbstractCegarLoop]: Abstraction has 1971 states and 6478 transitions. [2022-02-15 13:35:07,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:07,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 6478 transitions. [2022-02-15 13:35:07,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:07,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:07,745 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:07,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:07,960 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,SelfDestructingSolverStorable307 [2022-02-15 13:35:07,961 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:07,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:07,961 INFO L85 PathProgramCache]: Analyzing trace with hash -683657845, now seen corresponding path program 293 times [2022-02-15 13:35:07,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:07,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965788232] [2022-02-15 13:35:07,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:07,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:08,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:08,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965788232] [2022-02-15 13:35:08,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965788232] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:08,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635017401] [2022-02-15 13:35:08,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:35:08,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:08,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:08,063 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) [2022-02-15 13:35:08,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-02-15 13:35:08,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:35:08,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:08,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:08,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:08,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-02-15 13:35:08,247 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 30 treesize of output 24 [2022-02-15 13:35:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:08,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:08,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:08,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 53 [2022-02-15 13:35:08,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:08,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-02-15 13:35:08,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:08,727 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 46 treesize of output 43 [2022-02-15 13:35:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:08,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635017401] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:08,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:08,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:35:08,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124502486] [2022-02-15 13:35:08,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:08,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:35:08,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:08,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:35:08,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:35:08,773 INFO L87 Difference]: Start difference. First operand 1971 states and 6478 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:09,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:09,134 INFO L93 Difference]: Finished difference Result 2455 states and 7944 transitions. [2022-02-15 13:35:09,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:35:09,134 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:35:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:09,138 INFO L225 Difference]: With dead ends: 2455 [2022-02-15 13:35:09,139 INFO L226 Difference]: Without dead ends: 2424 [2022-02-15 13:35:09,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:35:09,139 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 152 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:09,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 206 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:35:09,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2022-02-15 13:35:09,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 1963. [2022-02-15 13:35:09,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.2920489296636086) internal successors, (6459), 1962 states have internal predecessors, (6459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:09,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 6459 transitions. [2022-02-15 13:35:09,165 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 6459 transitions. Word has length 24 [2022-02-15 13:35:09,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:09,165 INFO L470 AbstractCegarLoop]: Abstraction has 1963 states and 6459 transitions. [2022-02-15 13:35:09,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:09,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 6459 transitions. [2022-02-15 13:35:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:09,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:09,167 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:09,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Ended with exit code 0 [2022-02-15 13:35:09,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:09,383 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:09,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:09,383 INFO L85 PathProgramCache]: Analyzing trace with hash -492678687, now seen corresponding path program 294 times [2022-02-15 13:35:09,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:09,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755518030] [2022-02-15 13:35:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:09,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:09,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:09,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755518030] [2022-02-15 13:35:09,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755518030] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:09,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808426843] [2022-02-15 13:35:09,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:35:09,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:09,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:09,591 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) [2022-02-15 13:35:09,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-02-15 13:35:09,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:35:09,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:09,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:09,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:09,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:09,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:09,909 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-02-15 13:35:09,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:09,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 48 treesize of output 26 [2022-02-15 13:35:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:09,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:10,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:10,342 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 87 treesize of output 81 [2022-02-15 13:35:10,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:10,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 111 [2022-02-15 13:35:10,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:10,459 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 103 treesize of output 87 [2022-02-15 13:35:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:10,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808426843] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:10,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:10,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:10,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784841337] [2022-02-15 13:35:10,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:10,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:10,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:10,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:10,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:10,511 INFO L87 Difference]: Start difference. First operand 1963 states and 6459 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:10,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:10,799 INFO L93 Difference]: Finished difference Result 2192 states and 7108 transitions. [2022-02-15 13:35:10,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:35:10,799 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:35:10,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:10,803 INFO L225 Difference]: With dead ends: 2192 [2022-02-15 13:35:10,803 INFO L226 Difference]: Without dead ends: 2122 [2022-02-15 13:35:10,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:35:10,803 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 52 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 438 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:10,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 355 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 667 Invalid, 0 Unknown, 438 Unchecked, 0.2s Time] [2022-02-15 13:35:10,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2022-02-15 13:35:10,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1971. [2022-02-15 13:35:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1970 states have (on average 3.288832487309645) internal successors, (6479), 1970 states have internal predecessors, (6479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:10,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 6479 transitions. [2022-02-15 13:35:10,828 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 6479 transitions. Word has length 24 [2022-02-15 13:35:10,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:10,828 INFO L470 AbstractCegarLoop]: Abstraction has 1971 states and 6479 transitions. [2022-02-15 13:35:10,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:10,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 6479 transitions. [2022-02-15 13:35:10,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:10,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:10,831 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:10,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-02-15 13:35:11,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2022-02-15 13:35:11,047 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:11,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:11,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1134456221, now seen corresponding path program 295 times [2022-02-15 13:35:11,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:11,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047589647] [2022-02-15 13:35:11,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:11,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:11,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:11,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047589647] [2022-02-15 13:35:11,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047589647] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:11,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405385350] [2022-02-15 13:35:11,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:35:11,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:11,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:11,243 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) [2022-02-15 13:35:11,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-02-15 13:35:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:11,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:11,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:11,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:11,326 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:11,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:11,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:35:11,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:11,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:35:11,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:11,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:12,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:12,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-02-15 13:35:12,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:12,140 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 126 treesize of output 110 [2022-02-15 13:35:12,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:12,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-02-15 13:35:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:12,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405385350] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:12,232 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:12,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:35:12,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298512603] [2022-02-15 13:35:12,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:12,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:35:12,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:12,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:35:12,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:35:12,233 INFO L87 Difference]: Start difference. First operand 1971 states and 6479 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2022-02-15 13:35:12,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:12,438 INFO L93 Difference]: Finished difference Result 2080 states and 6786 transitions. [2022-02-15 13:35:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:35:12,439 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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 24 [2022-02-15 13:35:12,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:12,442 INFO L225 Difference]: With dead ends: 2080 [2022-02-15 13:35:12,442 INFO L226 Difference]: Without dead ends: 2049 [2022-02-15 13:35:12,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:35:12,443 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:12,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 213 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 626 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-02-15 13:35:12,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2022-02-15 13:35:12,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1970. [2022-02-15 13:35:12,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 3.2884713052310817) internal successors, (6475), 1969 states have internal predecessors, (6475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:12,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 6475 transitions. [2022-02-15 13:35:12,466 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 6475 transitions. Word has length 24 [2022-02-15 13:35:12,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:12,466 INFO L470 AbstractCegarLoop]: Abstraction has 1970 states and 6475 transitions. [2022-02-15 13:35:12,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 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) [2022-02-15 13:35:12,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 6475 transitions. [2022-02-15 13:35:12,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:12,468 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:12,468 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:12,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:12,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-02-15 13:35:12,684 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:12,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:12,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1378283027, now seen corresponding path program 296 times [2022-02-15 13:35:12,684 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:12,684 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008890661] [2022-02-15 13:35:12,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:12,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:12,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:12,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008890661] [2022-02-15 13:35:12,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008890661] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:12,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662759993] [2022-02-15 13:35:12,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:35:12,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:12,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:12,926 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) [2022-02-15 13:35:12,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-02-15 13:35:12,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:35:12,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:12,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:12,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:13,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:13,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:13,170 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:35:13,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:13,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:35:13,332 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:13,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:14,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:14,058 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 87 treesize of output 81 [2022-02-15 13:35:14,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:14,194 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 126 treesize of output 110 [2022-02-15 13:35:14,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:14,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-02-15 13:35:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:14,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662759993] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:14,278 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:14,278 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:14,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073951756] [2022-02-15 13:35:14,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:14,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:14,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:14,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:14,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:14,279 INFO L87 Difference]: Start difference. First operand 1970 states and 6475 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:14,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:14,864 INFO L93 Difference]: Finished difference Result 2369 states and 7618 transitions. [2022-02-15 13:35:14,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:35:14,864 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:35:14,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:14,868 INFO L225 Difference]: With dead ends: 2369 [2022-02-15 13:35:14,868 INFO L226 Difference]: Without dead ends: 2253 [2022-02-15 13:35:14,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:35:14,868 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 123 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:14,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 286 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 517 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2022-02-15 13:35:14,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2022-02-15 13:35:14,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1980. [2022-02-15 13:35:14,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1979 states have (on average 3.2915613946437596) internal successors, (6514), 1979 states have internal predecessors, (6514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:14,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 6514 transitions. [2022-02-15 13:35:14,893 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 6514 transitions. Word has length 24 [2022-02-15 13:35:14,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:14,893 INFO L470 AbstractCegarLoop]: Abstraction has 1980 states and 6514 transitions. [2022-02-15 13:35:14,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:14,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 6514 transitions. [2022-02-15 13:35:14,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:14,895 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:14,895 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:14,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-02-15 13:35:15,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-02-15 13:35:15,098 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:15,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:15,098 INFO L85 PathProgramCache]: Analyzing trace with hash -483264379, now seen corresponding path program 297 times [2022-02-15 13:35:15,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:15,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445253021] [2022-02-15 13:35:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:15,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:15,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:15,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445253021] [2022-02-15 13:35:15,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445253021] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:15,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963603082] [2022-02-15 13:35:15,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:35:15,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:15,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:15,308 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) [2022-02-15 13:35:15,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-02-15 13:35:15,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:35:15,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:15,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:35:15,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:15,404 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 41 treesize of output 35 [2022-02-15 13:35:15,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:15,613 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:35:15,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:15,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 17 [2022-02-15 13:35:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:15,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:16,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:16,093 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 53 treesize of output 51 [2022-02-15 13:35:16,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:16,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 78 [2022-02-15 13:35:16,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:16,166 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 70 treesize of output 62 [2022-02-15 13:35:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:16,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963603082] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:16,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:16,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:16,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037538074] [2022-02-15 13:35:16,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:16,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:16,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:16,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:16,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:16,218 INFO L87 Difference]: Start difference. First operand 1980 states and 6514 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:16,724 INFO L93 Difference]: Finished difference Result 2654 states and 8443 transitions. [2022-02-15 13:35:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:35:16,725 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:35:16,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:16,730 INFO L225 Difference]: With dead ends: 2654 [2022-02-15 13:35:16,730 INFO L226 Difference]: Without dead ends: 2550 [2022-02-15 13:35:16,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:35:16,730 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 130 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:16,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 420 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1035 Invalid, 0 Unknown, 92 Unchecked, 0.4s Time] [2022-02-15 13:35:16,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2022-02-15 13:35:16,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 1994. [2022-02-15 13:35:16,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 3.2965378825890617) internal successors, (6570), 1993 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:16,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 6570 transitions. [2022-02-15 13:35:16,763 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 6570 transitions. Word has length 24 [2022-02-15 13:35:16,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:16,763 INFO L470 AbstractCegarLoop]: Abstraction has 1994 states and 6570 transitions. [2022-02-15 13:35:16,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:16,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 6570 transitions. [2022-02-15 13:35:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:16,765 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:16,765 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:16,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-02-15 13:35:16,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-02-15 13:35:16,981 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:16,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:16,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1080761951, now seen corresponding path program 298 times [2022-02-15 13:35:16,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:16,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612137391] [2022-02-15 13:35:16,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:16,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:17,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:17,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612137391] [2022-02-15 13:35:17,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612137391] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:17,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306759319] [2022-02-15 13:35:17,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:35:17,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:17,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:17,248 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) [2022-02-15 13:35:17,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-02-15 13:35:17,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:35:17,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:17,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:17,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:17,339 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 41 treesize of output 35 [2022-02-15 13:35:17,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:17,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:35:17,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:17,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 12 treesize of output 3 [2022-02-15 13:35:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:17,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:18,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:18,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-02-15 13:35:18,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:18,403 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 126 treesize of output 110 [2022-02-15 13:35:18,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:18,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-02-15 13:35:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:18,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306759319] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:18,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:18,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:18,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881514610] [2022-02-15 13:35:18,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:18,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:18,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:18,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:18,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:18,449 INFO L87 Difference]: Start difference. First operand 1994 states and 6570 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:18,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:18,667 INFO L93 Difference]: Finished difference Result 2273 states and 7392 transitions. [2022-02-15 13:35:18,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:35:18,667 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:35:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:18,671 INFO L225 Difference]: With dead ends: 2273 [2022-02-15 13:35:18,671 INFO L226 Difference]: Without dead ends: 2231 [2022-02-15 13:35:18,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:35:18,671 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:18,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 234 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 605 Invalid, 0 Unknown, 63 Unchecked, 0.2s Time] [2022-02-15 13:35:18,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2022-02-15 13:35:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2004. [2022-02-15 13:35:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.296055916125811) internal successors, (6602), 2003 states have internal predecessors, (6602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:18,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 6602 transitions. [2022-02-15 13:35:18,696 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 6602 transitions. Word has length 24 [2022-02-15 13:35:18,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:18,696 INFO L470 AbstractCegarLoop]: Abstraction has 2004 states and 6602 transitions. [2022-02-15 13:35:18,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:18,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 6602 transitions. [2022-02-15 13:35:18,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:18,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:18,699 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:18,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:18,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:18,911 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:18,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:18,911 INFO L85 PathProgramCache]: Analyzing trace with hash 762721441, now seen corresponding path program 299 times [2022-02-15 13:35:18,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:18,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419466068] [2022-02-15 13:35:18,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:18,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:19,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:19,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419466068] [2022-02-15 13:35:19,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419466068] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:19,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031879665] [2022-02-15 13:35:19,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:35:19,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:19,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:19,178 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) [2022-02-15 13:35:19,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-02-15 13:35:19,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:35:19,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:19,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:19,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:19,250 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 41 treesize of output 35 [2022-02-15 13:35:19,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:19,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:35:19,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:19,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:35:19,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:19,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:20,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:20,021 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 47 treesize of output 47 [2022-02-15 13:35:20,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:20,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2022-02-15 13:35:20,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:20,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-02-15 13:35:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:20,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031879665] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:20,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:20,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:20,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895330405] [2022-02-15 13:35:20,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:20,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:20,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:20,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:20,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:20,161 INFO L87 Difference]: Start difference. First operand 2004 states and 6602 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:20,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:20,691 INFO L93 Difference]: Finished difference Result 2486 states and 8044 transitions. [2022-02-15 13:35:20,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:35:20,691 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:35:20,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:20,695 INFO L225 Difference]: With dead ends: 2486 [2022-02-15 13:35:20,695 INFO L226 Difference]: Without dead ends: 2424 [2022-02-15 13:35:20,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:35:20,695 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 156 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:20,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 357 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 643 Invalid, 0 Unknown, 469 Unchecked, 0.3s Time] [2022-02-15 13:35:20,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2022-02-15 13:35:20,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 2079. [2022-02-15 13:35:20,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 3.2834456207892204) internal successors, (6823), 2078 states have internal predecessors, (6823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:20,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 6823 transitions. [2022-02-15 13:35:20,723 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 6823 transitions. Word has length 24 [2022-02-15 13:35:20,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:20,723 INFO L470 AbstractCegarLoop]: Abstraction has 2079 states and 6823 transitions. [2022-02-15 13:35:20,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:20,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 6823 transitions. [2022-02-15 13:35:20,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:20,725 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:20,726 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:20,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:20,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:20,942 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:20,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:20,942 INFO L85 PathProgramCache]: Analyzing trace with hash 778182237, now seen corresponding path program 300 times [2022-02-15 13:35:20,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:20,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297163420] [2022-02-15 13:35:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:20,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:21,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:21,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297163420] [2022-02-15 13:35:21,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297163420] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:21,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941045534] [2022-02-15 13:35:21,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:35:21,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:21,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:21,166 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) [2022-02-15 13:35:21,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-02-15 13:35:21,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:35:21,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:21,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:21,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:21,239 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 41 treesize of output 35 [2022-02-15 13:35:21,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:21,376 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:35:21,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:21,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:35:21,445 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:21,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:21,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:21,864 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 58 treesize of output 56 [2022-02-15 13:35:21,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:21,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 53 [2022-02-15 13:35:21,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:21,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 41 [2022-02-15 13:35:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:21,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941045534] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:21,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:21,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:21,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189995930] [2022-02-15 13:35:21,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:21,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:21,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:21,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:21,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:21,950 INFO L87 Difference]: Start difference. First operand 2079 states and 6823 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:22,346 INFO L93 Difference]: Finished difference Result 2460 states and 7968 transitions. [2022-02-15 13:35:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:35:22,346 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:35:22,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:22,350 INFO L225 Difference]: With dead ends: 2460 [2022-02-15 13:35:22,350 INFO L226 Difference]: Without dead ends: 2426 [2022-02-15 13:35:22,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:35:22,350 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 130 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 576 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:22,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 374 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 689 Invalid, 0 Unknown, 576 Unchecked, 0.2s Time] [2022-02-15 13:35:22,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2022-02-15 13:35:22,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 2066. [2022-02-15 13:35:22,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 3.286682808716707) internal successors, (6787), 2065 states have internal predecessors, (6787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 6787 transitions. [2022-02-15 13:35:22,403 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 6787 transitions. Word has length 24 [2022-02-15 13:35:22,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:22,403 INFO L470 AbstractCegarLoop]: Abstraction has 2066 states and 6787 transitions. [2022-02-15 13:35:22,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:22,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 6787 transitions. [2022-02-15 13:35:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:22,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:22,406 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:22,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-02-15 13:35:22,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:22,622 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:22,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:22,623 INFO L85 PathProgramCache]: Analyzing trace with hash 681879635, now seen corresponding path program 301 times [2022-02-15 13:35:22,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:22,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456606911] [2022-02-15 13:35:22,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:22,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:22,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:22,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:22,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456606911] [2022-02-15 13:35:22,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456606911] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:22,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881196749] [2022-02-15 13:35:22,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:35:22,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:22,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:22,809 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) [2022-02-15 13:35:22,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-02-15 13:35:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:22,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:22,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:22,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:22,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:23,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:23,063 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:35:23,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:23,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:23,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:23,762 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 87 treesize of output 81 [2022-02-15 13:35:23,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:23,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-02-15 13:35:23,865 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:23,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-02-15 13:35:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:23,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881196749] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:23,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:23,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:23,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424656871] [2022-02-15 13:35:23,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:23,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:23,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:23,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:23,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:23,970 INFO L87 Difference]: Start difference. First operand 2066 states and 6787 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:24,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:24,206 INFO L93 Difference]: Finished difference Result 2340 states and 7612 transitions. [2022-02-15 13:35:24,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:35:24,206 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:35:24,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:24,210 INFO L225 Difference]: With dead ends: 2340 [2022-02-15 13:35:24,210 INFO L226 Difference]: Without dead ends: 2326 [2022-02-15 13:35:24,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:35:24,210 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:24,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 205 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 491 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-02-15 13:35:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2022-02-15 13:35:24,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 2054. [2022-02-15 13:35:24,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 3.2888455918168535) internal successors, (6752), 2053 states have internal predecessors, (6752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:24,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 6752 transitions. [2022-02-15 13:35:24,234 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 6752 transitions. Word has length 24 [2022-02-15 13:35:24,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:24,234 INFO L470 AbstractCegarLoop]: Abstraction has 2054 states and 6752 transitions. [2022-02-15 13:35:24,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:24,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 6752 transitions. [2022-02-15 13:35:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:24,236 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:24,236 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:24,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:24,452 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,SelfDestructingSolverStorable316 [2022-02-15 13:35:24,452 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:24,452 INFO L85 PathProgramCache]: Analyzing trace with hash -813016629, now seen corresponding path program 302 times [2022-02-15 13:35:24,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:24,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664420683] [2022-02-15 13:35:24,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:24,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:24,578 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:24,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664420683] [2022-02-15 13:35:24,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664420683] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:24,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513195832] [2022-02-15 13:35:24,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:35:24,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:24,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:24,580 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) [2022-02-15 13:35:24,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-02-15 13:35:24,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:35:24,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:24,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:24,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:24,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:24,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:35:24,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:35:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:24,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:25,214 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:25,214 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 87 treesize of output 81 [2022-02-15 13:35:25,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:25,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-02-15 13:35:25,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:25,315 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 102 treesize of output 86 [2022-02-15 13:35:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:25,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513195832] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:25,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:25,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-15 13:35:25,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410809727] [2022-02-15 13:35:25,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:25,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:35:25,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:25,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:35:25,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:35:25,356 INFO L87 Difference]: Start difference. First operand 2054 states and 6752 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) [2022-02-15 13:35:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:25,674 INFO L93 Difference]: Finished difference Result 2652 states and 8488 transitions. [2022-02-15 13:35:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:35:25,674 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 24 [2022-02-15 13:35:25,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:25,704 INFO L225 Difference]: With dead ends: 2652 [2022-02-15 13:35:25,704 INFO L226 Difference]: Without dead ends: 2594 [2022-02-15 13:35:25,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:35:25,704 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 103 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:25,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 343 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 923 Invalid, 0 Unknown, 178 Unchecked, 0.3s Time] [2022-02-15 13:35:25,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2594 states. [2022-02-15 13:35:25,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2594 to 2055. [2022-02-15 13:35:25,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.2891918208373903) internal successors, (6756), 2054 states have internal predecessors, (6756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6756 transitions. [2022-02-15 13:35:25,731 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6756 transitions. Word has length 24 [2022-02-15 13:35:25,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:25,731 INFO L470 AbstractCegarLoop]: Abstraction has 2055 states and 6756 transitions. [2022-02-15 13:35:25,731 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) [2022-02-15 13:35:25,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6756 transitions. [2022-02-15 13:35:25,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:25,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:25,734 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:25,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Ended with exit code 0 [2022-02-15 13:35:25,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:25,935 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:25,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:25,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1789243013, now seen corresponding path program 303 times [2022-02-15 13:35:25,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:25,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963996254] [2022-02-15 13:35:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:25,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:26,079 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:26,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963996254] [2022-02-15 13:35:26,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963996254] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:26,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90714348] [2022-02-15 13:35:26,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:35:26,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:26,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:26,080 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) [2022-02-15 13:35:26,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-02-15 13:35:26,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 13:35:26,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:26,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:26,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:26,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:26,146 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:26,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:26,241 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:35:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:26,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:26,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:26,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-02-15 13:35:26,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:26,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-02-15 13:35:26,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:26,724 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 99 treesize of output 83 [2022-02-15 13:35:26,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:26,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90714348] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:26,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:26,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:26,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813808255] [2022-02-15 13:35:26,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:26,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:26,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:26,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:26,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:26,759 INFO L87 Difference]: Start difference. First operand 2055 states and 6756 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:27,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:27,066 INFO L93 Difference]: Finished difference Result 2268 states and 7384 transitions. [2022-02-15 13:35:27,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:35:27,067 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:35:27,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:27,070 INFO L225 Difference]: With dead ends: 2268 [2022-02-15 13:35:27,070 INFO L226 Difference]: Without dead ends: 2233 [2022-02-15 13:35:27,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:35:27,071 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 83 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:27,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 321 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 682 Invalid, 0 Unknown, 377 Unchecked, 0.2s Time] [2022-02-15 13:35:27,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2022-02-15 13:35:27,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 2059. [2022-02-15 13:35:27,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 2058 states have (on average 3.2876579203109815) internal successors, (6766), 2058 states have internal predecessors, (6766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:27,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 6766 transitions. [2022-02-15 13:35:27,095 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 6766 transitions. Word has length 24 [2022-02-15 13:35:27,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:27,095 INFO L470 AbstractCegarLoop]: Abstraction has 2059 states and 6766 transitions. [2022-02-15 13:35:27,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:27,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 6766 transitions. [2022-02-15 13:35:27,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:27,098 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:27,098 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:27,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:27,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:27,314 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:27,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:27,314 INFO L85 PathProgramCache]: Analyzing trace with hash -162108105, now seen corresponding path program 304 times [2022-02-15 13:35:27,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:27,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293940806] [2022-02-15 13:35:27,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:27,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:27,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:27,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293940806] [2022-02-15 13:35:27,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293940806] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:27,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348349128] [2022-02-15 13:35:27,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:35:27,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:27,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:27,484 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) [2022-02-15 13:35:27,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-02-15 13:35:27,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:35:27,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:27,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:27,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:27,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:27,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:27,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:27,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 treesize of output 37 [2022-02-15 13:35:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:27,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:28,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:28,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-02-15 13:35:28,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:28,140 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 126 treesize of output 110 [2022-02-15 13:35:28,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:28,145 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 102 treesize of output 86 [2022-02-15 13:35:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:28,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348349128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:28,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:28,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:28,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983443541] [2022-02-15 13:35:28,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:28,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:28,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:28,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:28,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:28,213 INFO L87 Difference]: Start difference. First operand 2059 states and 6766 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:28,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:28,449 INFO L93 Difference]: Finished difference Result 2270 states and 7356 transitions. [2022-02-15 13:35:28,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:35:28,449 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:35:28,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:28,453 INFO L225 Difference]: With dead ends: 2270 [2022-02-15 13:35:28,453 INFO L226 Difference]: Without dead ends: 2239 [2022-02-15 13:35:28,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:28,453 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 91 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:28,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 253 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 699 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-02-15 13:35:28,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2022-02-15 13:35:28,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 2061. [2022-02-15 13:35:28,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.286893203883495) internal successors, (6771), 2060 states have internal predecessors, (6771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 6771 transitions. [2022-02-15 13:35:28,478 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 6771 transitions. Word has length 24 [2022-02-15 13:35:28,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:28,478 INFO L470 AbstractCegarLoop]: Abstraction has 2061 states and 6771 transitions. [2022-02-15 13:35:28,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:28,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 6771 transitions. [2022-02-15 13:35:28,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:28,480 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:28,480 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:28,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:28,691 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,SelfDestructingSolverStorable319 [2022-02-15 13:35:28,691 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:28,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:28,692 INFO L85 PathProgramCache]: Analyzing trace with hash 141467187, now seen corresponding path program 305 times [2022-02-15 13:35:28,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:28,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63556914] [2022-02-15 13:35:28,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:28,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:28,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:28,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63556914] [2022-02-15 13:35:28,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63556914] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:28,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930530618] [2022-02-15 13:35:28,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:35:28,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:28,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:28,884 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) [2022-02-15 13:35:28,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-02-15 13:35:28,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:35:28,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:28,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:28,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:28,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:28,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:29,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:29,092 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:35:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:29,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:29,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:29,615 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 56 treesize of output 54 [2022-02-15 13:35:29,684 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:29,684 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 54 treesize of output 51 [2022-02-15 13:35:29,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:29,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-02-15 13:35:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:29,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930530618] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:29,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:29,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:29,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460531456] [2022-02-15 13:35:29,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:29,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:29,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:29,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:29,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:29,731 INFO L87 Difference]: Start difference. First operand 2061 states and 6771 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:30,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:30,094 INFO L93 Difference]: Finished difference Result 2712 states and 8651 transitions. [2022-02-15 13:35:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:35:30,094 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:35:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:30,098 INFO L225 Difference]: With dead ends: 2712 [2022-02-15 13:35:30,098 INFO L226 Difference]: Without dead ends: 2681 [2022-02-15 13:35:30,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:35:30,099 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 126 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 777 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:30,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 426 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 571 Invalid, 0 Unknown, 777 Unchecked, 0.2s Time] [2022-02-15 13:35:30,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2022-02-15 13:35:30,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2097. [2022-02-15 13:35:30,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2096 states have (on average 3.273854961832061) internal successors, (6862), 2096 states have internal predecessors, (6862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:30,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 6862 transitions. [2022-02-15 13:35:30,128 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 6862 transitions. Word has length 24 [2022-02-15 13:35:30,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:30,128 INFO L470 AbstractCegarLoop]: Abstraction has 2097 states and 6862 transitions. [2022-02-15 13:35:30,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:30,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 6862 transitions. [2022-02-15 13:35:30,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:30,131 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:30,131 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:30,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:30,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-02-15 13:35:30,344 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1440881399, now seen corresponding path program 306 times [2022-02-15 13:35:30,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:30,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452617458] [2022-02-15 13:35:30,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:30,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:30,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:30,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452617458] [2022-02-15 13:35:30,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452617458] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:30,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64900708] [2022-02-15 13:35:30,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:35:30,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:30,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:30,508 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) [2022-02-15 13:35:30,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-02-15 13:35:30,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:35:30,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:30,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:30,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:30,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:30,609 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:30,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:30,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:35:30,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:30,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:31,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:31,348 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 87 treesize of output 81 [2022-02-15 13:35:31,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:31,481 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 126 treesize of output 110 [2022-02-15 13:35:31,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:31,487 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 102 treesize of output 86 [2022-02-15 13:35:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:31,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64900708] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:31,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:31,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:31,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011239010] [2022-02-15 13:35:31,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:31,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:31,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:31,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:31,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:31,551 INFO L87 Difference]: Start difference. First operand 2097 states and 6862 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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) [2022-02-15 13:35:32,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:32,370 INFO L93 Difference]: Finished difference Result 2749 states and 8701 transitions. [2022-02-15 13:35:32,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:35:32,370 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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 24 [2022-02-15 13:35:32,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:32,375 INFO L225 Difference]: With dead ends: 2749 [2022-02-15 13:35:32,375 INFO L226 Difference]: Without dead ends: 2672 [2022-02-15 13:35:32,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:35:32,375 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 127 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:32,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 363 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 880 Invalid, 0 Unknown, 160 Unchecked, 0.4s Time] [2022-02-15 13:35:32,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2022-02-15 13:35:32,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2051. [2022-02-15 13:35:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.2892682926829266) internal successors, (6743), 2050 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6743 transitions. [2022-02-15 13:35:32,404 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6743 transitions. Word has length 24 [2022-02-15 13:35:32,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:32,404 INFO L470 AbstractCegarLoop]: Abstraction has 2051 states and 6743 transitions. [2022-02-15 13:35:32,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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) [2022-02-15 13:35:32,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6743 transitions. [2022-02-15 13:35:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:32,407 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:32,407 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:32,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-02-15 13:35:32,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-02-15 13:35:32,611 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:32,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:32,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1971656619, now seen corresponding path program 307 times [2022-02-15 13:35:32,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:32,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047662293] [2022-02-15 13:35:32,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:32,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:32,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:32,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047662293] [2022-02-15 13:35:32,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047662293] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:32,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227470007] [2022-02-15 13:35:32,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:35:32,731 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:32,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:32,732 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) [2022-02-15 13:35:32,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-02-15 13:35:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:32,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:32,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:32,821 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 30 treesize of output 24 [2022-02-15 13:35:32,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2022-02-15 13:35:32,881 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 44 treesize of output 36 [2022-02-15 13:35:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:32,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:33,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:33,192 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 77 treesize of output 75 [2022-02-15 13:35:33,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:33,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-02-15 13:35:33,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:33,392 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 102 treesize of output 86 [2022-02-15 13:35:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:33,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227470007] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:33,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:33,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:35:33,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105072784] [2022-02-15 13:35:33,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:33,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:35:33,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:33,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:35:33,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:35:33,447 INFO L87 Difference]: Start difference. First operand 2051 states and 6743 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:33,856 INFO L93 Difference]: Finished difference Result 2232 states and 7257 transitions. [2022-02-15 13:35:33,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:35:33,857 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:35:33,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:33,860 INFO L225 Difference]: With dead ends: 2232 [2022-02-15 13:35:33,860 INFO L226 Difference]: Without dead ends: 2193 [2022-02-15 13:35:33,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:35:33,860 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 77 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:33,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 203 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:35:33,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2022-02-15 13:35:33,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 2049. [2022-02-15 13:35:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.2900390625) internal successors, (6738), 2048 states have internal predecessors, (6738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6738 transitions. [2022-02-15 13:35:33,883 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6738 transitions. Word has length 24 [2022-02-15 13:35:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:33,883 INFO L470 AbstractCegarLoop]: Abstraction has 2049 states and 6738 transitions. [2022-02-15 13:35:33,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:33,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6738 transitions. [2022-02-15 13:35:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:33,885 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:33,886 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:33,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-02-15 13:35:34,098 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,SelfDestructingSolverStorable322 [2022-02-15 13:35:34,098 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:34,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:34,098 INFO L85 PathProgramCache]: Analyzing trace with hash 873231215, now seen corresponding path program 308 times [2022-02-15 13:35:34,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:34,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550926237] [2022-02-15 13:35:34,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:34,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:34,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:34,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550926237] [2022-02-15 13:35:34,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550926237] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:34,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35750563] [2022-02-15 13:35:34,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:35:34,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:34,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:34,234 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) [2022-02-15 13:35:34,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-02-15 13:35:34,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:35:34,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:34,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:34,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:34,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:35:34,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:34,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 54 treesize of output 46 [2022-02-15 13:35:34,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:34,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 50 treesize of output 30 [2022-02-15 13:35:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:34,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:34,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:34,676 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 77 treesize of output 75 [2022-02-15 13:35:34,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:34,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-02-15 13:35:34,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:34,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-02-15 13:35:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:34,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35750563] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:34,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:34,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:34,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439974853] [2022-02-15 13:35:34,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:34,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:34,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:34,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:34,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:34,926 INFO L87 Difference]: Start difference. First operand 2049 states and 6738 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:35,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:35,651 INFO L93 Difference]: Finished difference Result 2303 states and 7400 transitions. [2022-02-15 13:35:35,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:35:35,652 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:35:35,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:35,655 INFO L225 Difference]: With dead ends: 2303 [2022-02-15 13:35:35,655 INFO L226 Difference]: Without dead ends: 2221 [2022-02-15 13:35:35,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:35:35,656 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 80 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:35,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 341 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1051 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2022-02-15 13:35:35,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2022-02-15 13:35:35,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 2049. [2022-02-15 13:35:35,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.2900390625) internal successors, (6738), 2048 states have internal predecessors, (6738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 6738 transitions. [2022-02-15 13:35:35,680 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 6738 transitions. Word has length 24 [2022-02-15 13:35:35,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:35,680 INFO L470 AbstractCegarLoop]: Abstraction has 2049 states and 6738 transitions. [2022-02-15 13:35:35,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:35,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 6738 transitions. [2022-02-15 13:35:35,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:35,683 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:35,683 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:35,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:35,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-02-15 13:35:35,895 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:35,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:35,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1089979503, now seen corresponding path program 309 times [2022-02-15 13:35:35,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:35,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964686867] [2022-02-15 13:35:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:35,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:36,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:36,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964686867] [2022-02-15 13:35:36,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964686867] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:36,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725072501] [2022-02-15 13:35:36,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:35:36,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:36,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:36,070 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) [2022-02-15 13:35:36,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-02-15 13:35:36,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:35:36,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:36,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:35:36,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:36,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:35:36,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:36,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-02-15 13:35:36,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:36,233 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2022-02-15 13:35:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:36,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:36,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:36,637 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 108 treesize of output 102 [2022-02-15 13:35:36,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:36,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 73 [2022-02-15 13:35:36,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:36,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 57 [2022-02-15 13:35:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:36,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725072501] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:36,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:36,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:36,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049395244] [2022-02-15 13:35:36,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:36,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:36,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:36,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:36,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:36,898 INFO L87 Difference]: Start difference. First operand 2049 states and 6738 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:37,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:37,596 INFO L93 Difference]: Finished difference Result 2360 states and 7551 transitions. [2022-02-15 13:35:37,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:35:37,596 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:35:37,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:37,601 INFO L225 Difference]: With dead ends: 2360 [2022-02-15 13:35:37,601 INFO L226 Difference]: Without dead ends: 2276 [2022-02-15 13:35:37,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:35:37,601 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 96 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:37,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 339 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1032 Invalid, 0 Unknown, 15 Unchecked, 0.4s Time] [2022-02-15 13:35:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2022-02-15 13:35:37,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 2051. [2022-02-15 13:35:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.2868292682926827) internal successors, (6738), 2050 states have internal predecessors, (6738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6738 transitions. [2022-02-15 13:35:37,627 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6738 transitions. Word has length 24 [2022-02-15 13:35:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:37,628 INFO L470 AbstractCegarLoop]: Abstraction has 2051 states and 6738 transitions. [2022-02-15 13:35:37,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:35:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6738 transitions. [2022-02-15 13:35:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:37,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:37,630 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:37,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:37,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:37,843 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:37,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:37,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1216007631, now seen corresponding path program 310 times [2022-02-15 13:35:37,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:37,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268490487] [2022-02-15 13:35:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:37,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:37,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:37,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268490487] [2022-02-15 13:35:37,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268490487] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:37,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307098134] [2022-02-15 13:35:37,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:35:37,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:37,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:37,964 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) [2022-02-15 13:35:37,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-02-15 13:35:37,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:35:37,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:37,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:37,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:38,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:38,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:38,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:38,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:35:38,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:38,174 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:35:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:38,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:38,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:38,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:35:38,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:38,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:35:38,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:38,765 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 25 treesize of output 27 [2022-02-15 13:35:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:38,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307098134] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:38,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:38,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:38,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688366049] [2022-02-15 13:35:38,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:38,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:38,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:38,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:38,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:38,777 INFO L87 Difference]: Start difference. First operand 2051 states and 6738 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:38,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:38,958 INFO L93 Difference]: Finished difference Result 2171 states and 7074 transitions. [2022-02-15 13:35:38,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:35:38,958 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:35:38,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:38,962 INFO L225 Difference]: With dead ends: 2171 [2022-02-15 13:35:38,962 INFO L226 Difference]: Without dead ends: 2136 [2022-02-15 13:35:38,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:38,962 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:38,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 210 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 583 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-02-15 13:35:38,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2022-02-15 13:35:38,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2051. [2022-02-15 13:35:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.2868292682926827) internal successors, (6738), 2050 states have internal predecessors, (6738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:38,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6738 transitions. [2022-02-15 13:35:38,984 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6738 transitions. Word has length 24 [2022-02-15 13:35:38,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:38,984 INFO L470 AbstractCegarLoop]: Abstraction has 2051 states and 6738 transitions. [2022-02-15 13:35:38,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6738 transitions. [2022-02-15 13:35:38,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:38,987 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:38,987 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:39,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:39,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:39,203 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:39,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1499680715, now seen corresponding path program 311 times [2022-02-15 13:35:39,203 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:39,203 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835561965] [2022-02-15 13:35:39,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:39,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:39,346 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:39,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:39,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835561965] [2022-02-15 13:35:39,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835561965] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:39,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106064057] [2022-02-15 13:35:39,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:35:39,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:39,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:39,347 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) [2022-02-15 13:35:39,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-02-15 13:35:39,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:35:39,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:39,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:39,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:39,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:39,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:39,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:39,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:35:39,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:39,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:35:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:39,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:40,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:40,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 72 [2022-02-15 13:35:40,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:40,157 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 31 treesize of output 33 [2022-02-15 13:35:40,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:40,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:35:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:40,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106064057] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:40,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:40,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:40,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228605317] [2022-02-15 13:35:40,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:40,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:40,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:40,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:40,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:40,198 INFO L87 Difference]: Start difference. First operand 2051 states and 6738 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:40,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:40,488 INFO L93 Difference]: Finished difference Result 2235 states and 7231 transitions. [2022-02-15 13:35:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:35:40,489 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:35:40,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:40,492 INFO L225 Difference]: With dead ends: 2235 [2022-02-15 13:35:40,492 INFO L226 Difference]: Without dead ends: 2169 [2022-02-15 13:35:40,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:35:40,492 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 74 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:40,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 184 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 592 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2022-02-15 13:35:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2022-02-15 13:35:40,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 2051. [2022-02-15 13:35:40,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2051 states, 2050 states have (on average 3.2868292682926827) internal successors, (6738), 2050 states have internal predecessors, (6738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:40,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2051 states to 2051 states and 6738 transitions. [2022-02-15 13:35:40,516 INFO L78 Accepts]: Start accepts. Automaton has 2051 states and 6738 transitions. Word has length 24 [2022-02-15 13:35:40,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:40,516 INFO L470 AbstractCegarLoop]: Abstraction has 2051 states and 6738 transitions. [2022-02-15 13:35:40,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:40,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2051 states and 6738 transitions. [2022-02-15 13:35:40,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:40,518 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:40,518 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:40,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-02-15 13:35:40,733 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,SelfDestructingSolverStorable326 [2022-02-15 13:35:40,734 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:40,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:40,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1660727485, now seen corresponding path program 312 times [2022-02-15 13:35:40,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:40,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908410728] [2022-02-15 13:35:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:40,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:40,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:40,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908410728] [2022-02-15 13:35:40,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908410728] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:40,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508948096] [2022-02-15 13:35:40,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:35:40,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:40,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:40,895 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) [2022-02-15 13:35:40,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-02-15 13:35:40,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:35:40,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:40,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:40,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:40,993 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 41 treesize of output 35 [2022-02-15 13:35:41,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:41,030 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:35:41,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:41,032 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:35:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:41,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:41,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:41,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-02-15 13:35:41,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:41,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:35:41,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:41,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:35:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:41,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508948096] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:41,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:41,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:35:41,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396349810] [2022-02-15 13:35:41,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:41,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:35:41,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:41,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:35:41,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:35:41,601 INFO L87 Difference]: Start difference. First operand 2051 states and 6738 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2022-02-15 13:35:42,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:42,520 INFO L93 Difference]: Finished difference Result 2561 states and 8239 transitions. [2022-02-15 13:35:42,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:35:42,521 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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 24 [2022-02-15 13:35:42,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:42,524 INFO L225 Difference]: With dead ends: 2561 [2022-02-15 13:35:42,524 INFO L226 Difference]: Without dead ends: 2464 [2022-02-15 13:35:42,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:35:42,524 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 133 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:42,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 283 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 966 Invalid, 0 Unknown, 7 Unchecked, 0.3s Time] [2022-02-15 13:35:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2022-02-15 13:35:42,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 2050. [2022-02-15 13:35:42,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 2049 states have (on average 3.2864812103465106) internal successors, (6734), 2049 states have internal predecessors, (6734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:42,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 6734 transitions. [2022-02-15 13:35:42,550 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 6734 transitions. Word has length 24 [2022-02-15 13:35:42,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:42,550 INFO L470 AbstractCegarLoop]: Abstraction has 2050 states and 6734 transitions. [2022-02-15 13:35:42,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2022-02-15 13:35:42,550 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 6734 transitions. [2022-02-15 13:35:42,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:42,553 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:42,553 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:42,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:42,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:42,775 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:42,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:42,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2031551247, now seen corresponding path program 313 times [2022-02-15 13:35:42,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:42,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496275174] [2022-02-15 13:35:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:42,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:42,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:42,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496275174] [2022-02-15 13:35:42,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496275174] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:42,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979648658] [2022-02-15 13:35:42,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:35:42,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:42,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:42,875 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) [2022-02-15 13:35:42,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-02-15 13:35:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:42,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:35:42,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:42,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:35:43,042 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 30 treesize of output 24 [2022-02-15 13:35:43,117 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:43,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:43,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:43,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-15 13:35:43,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:43,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:35:43,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:43,560 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 29 treesize of output 31 [2022-02-15 13:35:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:43,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979648658] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:43,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:43,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:35:43,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883891547] [2022-02-15 13:35:43,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:43,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:35:43,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:43,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:35:43,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:35:43,573 INFO L87 Difference]: Start difference. First operand 2050 states and 6734 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:43,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:43,992 INFO L93 Difference]: Finished difference Result 2389 states and 7738 transitions. [2022-02-15 13:35:43,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:35:43,992 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:35:43,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:43,996 INFO L225 Difference]: With dead ends: 2389 [2022-02-15 13:35:43,996 INFO L226 Difference]: Without dead ends: 2271 [2022-02-15 13:35:43,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:35:43,996 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 94 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:43,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 240 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 737 Invalid, 0 Unknown, 74 Unchecked, 0.3s Time] [2022-02-15 13:35:43,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2022-02-15 13:35:44,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2065. [2022-02-15 13:35:44,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 3.2848837209302326) internal successors, (6780), 2064 states have internal predecessors, (6780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:44,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 6780 transitions. [2022-02-15 13:35:44,022 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 6780 transitions. Word has length 24 [2022-02-15 13:35:44,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:44,022 INFO L470 AbstractCegarLoop]: Abstraction has 2065 states and 6780 transitions. [2022-02-15 13:35:44,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:44,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 6780 transitions. [2022-02-15 13:35:44,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:44,025 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:44,025 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:44,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-02-15 13:35:44,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:44,230 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:44,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:44,230 INFO L85 PathProgramCache]: Analyzing trace with hash -180526443, now seen corresponding path program 314 times [2022-02-15 13:35:44,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:44,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806153357] [2022-02-15 13:35:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:44,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:44,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:44,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806153357] [2022-02-15 13:35:44,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806153357] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:44,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196838866] [2022-02-15 13:35:44,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:35:44,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:44,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:44,392 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) [2022-02-15 13:35:44,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-02-15 13:35:44,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:35:44,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:44,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:44,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:44,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:35:44,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:35:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:44,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:44,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:44,930 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 81 treesize of output 72 [2022-02-15 13:35:45,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:45,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:35:45,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:45,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:35:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:45,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196838866] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:45,070 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:45,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-15 13:35:45,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751632127] [2022-02-15 13:35:45,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:45,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:35:45,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:45,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:35:45,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:35:45,071 INFO L87 Difference]: Start difference. First operand 2065 states and 6780 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:45,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:45,393 INFO L93 Difference]: Finished difference Result 2284 states and 7446 transitions. [2022-02-15 13:35:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:35:45,393 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:35:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:45,397 INFO L225 Difference]: With dead ends: 2284 [2022-02-15 13:35:45,397 INFO L226 Difference]: Without dead ends: 2253 [2022-02-15 13:35:45,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:35:45,397 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 85 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:45,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 196 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:35:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2022-02-15 13:35:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2058. [2022-02-15 13:35:45,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 3.2858531842489063) internal successors, (6759), 2057 states have internal predecessors, (6759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:45,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 6759 transitions. [2022-02-15 13:35:45,421 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 6759 transitions. Word has length 24 [2022-02-15 13:35:45,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:45,421 INFO L470 AbstractCegarLoop]: Abstraction has 2058 states and 6759 transitions. [2022-02-15 13:35:45,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:45,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 6759 transitions. [2022-02-15 13:35:45,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:45,424 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:45,424 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:45,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:45,639 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,SelfDestructingSolverStorable329 [2022-02-15 13:35:45,640 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:45,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:45,640 INFO L85 PathProgramCache]: Analyzing trace with hash -334295791, now seen corresponding path program 315 times [2022-02-15 13:35:45,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:45,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655964542] [2022-02-15 13:35:45,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:45,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:45,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:45,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:45,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655964542] [2022-02-15 13:35:45,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655964542] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:45,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82729380] [2022-02-15 13:35:45,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:35:45,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:45,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:45,826 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) [2022-02-15 13:35:45,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-02-15 13:35:45,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:35:45,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:45,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:35:45,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:45,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:46,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:46,070 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:35:46,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:46,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 treesize of output 7 [2022-02-15 13:35:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:46,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:46,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:46,789 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 73 treesize of output 67 [2022-02-15 13:35:46,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:46,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:35:46,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:46,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:35:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:46,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82729380] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:46,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:46,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:35:46,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326931997] [2022-02-15 13:35:46,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:46,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:35:46,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:46,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:35:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:35:46,900 INFO L87 Difference]: Start difference. First operand 2058 states and 6759 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-02-15 13:35:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:47,600 INFO L93 Difference]: Finished difference Result 2875 states and 9374 transitions. [2022-02-15 13:35:47,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:35:47,600 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 24 [2022-02-15 13:35:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:47,605 INFO L225 Difference]: With dead ends: 2875 [2022-02-15 13:35:47,606 INFO L226 Difference]: Without dead ends: 2709 [2022-02-15 13:35:47,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:35:47,606 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 129 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:47,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 323 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 850 Invalid, 0 Unknown, 55 Unchecked, 0.4s Time] [2022-02-15 13:35:47,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2709 states. [2022-02-15 13:35:47,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2709 to 2082. [2022-02-15 13:35:47,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 2081 states have (on average 3.2936088419029312) internal successors, (6854), 2081 states have internal predecessors, (6854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:47,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 6854 transitions. [2022-02-15 13:35:47,661 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 6854 transitions. Word has length 24 [2022-02-15 13:35:47,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:47,661 INFO L470 AbstractCegarLoop]: Abstraction has 2082 states and 6854 transitions. [2022-02-15 13:35:47,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-02-15 13:35:47,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 6854 transitions. [2022-02-15 13:35:47,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:47,664 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:47,664 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:47,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:47,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:47,879 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:47,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:47,880 INFO L85 PathProgramCache]: Analyzing trace with hash 329544441, now seen corresponding path program 316 times [2022-02-15 13:35:47,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:47,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664813797] [2022-02-15 13:35:47,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:47,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:48,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:48,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664813797] [2022-02-15 13:35:48,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664813797] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:48,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619215626] [2022-02-15 13:35:48,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:35:48,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:48,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:48,109 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) [2022-02-15 13:35:48,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-02-15 13:35:48,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:35:48,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:48,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:35:48,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:48,187 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 41 treesize of output 35 [2022-02-15 13:35:48,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:48,392 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-02-15 13:35:48,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:48,394 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:35:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:48,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:48,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:48,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-15 13:35:48,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:48,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:35:48,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:48,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:35:48,896 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:35:48,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619215626] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:48,897 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:48,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:48,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601906205] [2022-02-15 13:35:48,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:48,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:48,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:48,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:48,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:48,897 INFO L87 Difference]: Start difference. First operand 2082 states and 6854 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:49,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:49,178 INFO L93 Difference]: Finished difference Result 2609 states and 8572 transitions. [2022-02-15 13:35:49,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:35:49,178 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:35:49,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:49,183 INFO L225 Difference]: With dead ends: 2609 [2022-02-15 13:35:49,183 INFO L226 Difference]: Without dead ends: 2536 [2022-02-15 13:35:49,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:35:49,183 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 92 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:49,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 323 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 623 Invalid, 0 Unknown, 248 Unchecked, 0.2s Time] [2022-02-15 13:35:49,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2536 states. [2022-02-15 13:35:49,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2536 to 2085. [2022-02-15 13:35:49,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2085 states, 2084 states have (on average 3.2855086372360844) internal successors, (6847), 2084 states have internal predecessors, (6847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 6847 transitions. [2022-02-15 13:35:49,214 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 6847 transitions. Word has length 24 [2022-02-15 13:35:49,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:49,214 INFO L470 AbstractCegarLoop]: Abstraction has 2085 states and 6847 transitions. [2022-02-15 13:35:49,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:49,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 6847 transitions. [2022-02-15 13:35:49,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:49,217 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:49,217 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:49,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:49,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:49,434 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:49,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:49,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1295253653, now seen corresponding path program 317 times [2022-02-15 13:35:49,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:49,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558285717] [2022-02-15 13:35:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:49,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:49,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:49,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558285717] [2022-02-15 13:35:49,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558285717] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:49,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572086508] [2022-02-15 13:35:49,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:35:49,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:49,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:49,603 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) [2022-02-15 13:35:49,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-02-15 13:35:49,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:35:49,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:49,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:49,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:49,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:49,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:49,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:49,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-15 13:35:49,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-02-15 13:35:49,919 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:49,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:50,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:50,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 48 [2022-02-15 13:35:50,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:50,461 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 31 treesize of output 33 [2022-02-15 13:35:50,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:50,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:35:50,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:50,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572086508] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:50,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:50,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:35:50,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029341439] [2022-02-15 13:35:50,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:50,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:35:50,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:50,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:35:50,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:35:50,483 INFO L87 Difference]: Start difference. First operand 2085 states and 6847 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:51,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:51,010 INFO L93 Difference]: Finished difference Result 2691 states and 8851 transitions. [2022-02-15 13:35:51,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:35:51,010 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:35:51,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:51,015 INFO L225 Difference]: With dead ends: 2691 [2022-02-15 13:35:51,015 INFO L226 Difference]: Without dead ends: 2676 [2022-02-15 13:35:51,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:35:51,015 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 82 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:51,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 380 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 577 Invalid, 0 Unknown, 273 Unchecked, 0.2s Time] [2022-02-15 13:35:51,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2022-02-15 13:35:51,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2096. [2022-02-15 13:35:51,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 2095 states have (on average 3.282577565632458) internal successors, (6877), 2095 states have internal predecessors, (6877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:51,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 6877 transitions. [2022-02-15 13:35:51,043 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 6877 transitions. Word has length 24 [2022-02-15 13:35:51,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:51,044 INFO L470 AbstractCegarLoop]: Abstraction has 2096 states and 6877 transitions. [2022-02-15 13:35:51,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 6877 transitions. [2022-02-15 13:35:51,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:51,046 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:51,046 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:51,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:51,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:51,260 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:51,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:51,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1833109231, now seen corresponding path program 318 times [2022-02-15 13:35:51,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:51,260 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87600187] [2022-02-15 13:35:51,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:51,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:51,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:51,409 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:51,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87600187] [2022-02-15 13:35:51,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87600187] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:51,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449215988] [2022-02-15 13:35:51,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:35:51,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:51,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:51,410 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) [2022-02-15 13:35:51,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-02-15 13:35:51,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:35:51,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:51,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:35:51,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:51,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:51,480 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:51,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:51,731 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-02-15 13:35:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:51,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:52,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:52,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-15 13:35:52,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:52,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:35:52,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:52,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:35:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:52,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449215988] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:52,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:52,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:52,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444959215] [2022-02-15 13:35:52,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:52,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:52,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:52,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:52,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:52,365 INFO L87 Difference]: Start difference. First operand 2096 states and 6877 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:52,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:52,707 INFO L93 Difference]: Finished difference Result 2915 states and 9385 transitions. [2022-02-15 13:35:52,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:35:52,707 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:35:52,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:52,712 INFO L225 Difference]: With dead ends: 2915 [2022-02-15 13:35:52,712 INFO L226 Difference]: Without dead ends: 2828 [2022-02-15 13:35:52,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:35:52,713 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 137 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:52,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 320 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 699 Invalid, 0 Unknown, 122 Unchecked, 0.3s Time] [2022-02-15 13:35:52,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2022-02-15 13:35:52,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2099. [2022-02-15 13:35:52,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2098 states have (on average 3.2797902764537654) internal successors, (6881), 2098 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:52,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 6881 transitions. [2022-02-15 13:35:52,742 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 6881 transitions. Word has length 24 [2022-02-15 13:35:52,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:52,742 INFO L470 AbstractCegarLoop]: Abstraction has 2099 states and 6881 transitions. [2022-02-15 13:35:52,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:52,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 6881 transitions. [2022-02-15 13:35:52,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:52,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:52,745 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:52,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:52,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-02-15 13:35:52,958 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:52,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:52,958 INFO L85 PathProgramCache]: Analyzing trace with hash 325610755, now seen corresponding path program 319 times [2022-02-15 13:35:52,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:52,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915266402] [2022-02-15 13:35:52,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:52,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:35:53,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:53,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915266402] [2022-02-15 13:35:53,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915266402] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:53,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363974334] [2022-02-15 13:35:53,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:35:53,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:53,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:53,173 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) [2022-02-15 13:35:53,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-02-15 13:35:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:53,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:35:53,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:53,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:53,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:53,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:35:53,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:53,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:35:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:35:53,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:54,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:54,263 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 73 treesize of output 67 [2022-02-15 13:35:54,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:54,320 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 35 treesize of output 37 [2022-02-15 13:35:54,322 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:54,322 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 29 treesize of output 31 [2022-02-15 13:35:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:35:54,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363974334] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:54,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:54,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:54,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866087440] [2022-02-15 13:35:54,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:54,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:54,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:54,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:54,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:54,338 INFO L87 Difference]: Start difference. First operand 2099 states and 6881 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:54,935 INFO L93 Difference]: Finished difference Result 3190 states and 10176 transitions. [2022-02-15 13:35:54,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:35:54,935 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:35:54,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:54,940 INFO L225 Difference]: With dead ends: 3190 [2022-02-15 13:35:54,940 INFO L226 Difference]: Without dead ends: 3011 [2022-02-15 13:35:54,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=895, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:35:54,941 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 232 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 547 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:54,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 317 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 693 Invalid, 0 Unknown, 547 Unchecked, 0.2s Time] [2022-02-15 13:35:54,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2022-02-15 13:35:54,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 2099. [2022-02-15 13:35:54,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2098 states have (on average 3.2759771210676836) internal successors, (6873), 2098 states have internal predecessors, (6873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 6873 transitions. [2022-02-15 13:35:54,971 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 6873 transitions. Word has length 24 [2022-02-15 13:35:54,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:54,971 INFO L470 AbstractCegarLoop]: Abstraction has 2099 states and 6873 transitions. [2022-02-15 13:35:54,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 25 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:54,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 6873 transitions. [2022-02-15 13:35:54,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:54,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:54,974 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:54,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:55,176 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,SelfDestructingSolverStorable334 [2022-02-15 13:35:55,177 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:55,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:55,177 INFO L85 PathProgramCache]: Analyzing trace with hash 989450987, now seen corresponding path program 320 times [2022-02-15 13:35:55,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:55,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021304281] [2022-02-15 13:35:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:55,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:35:55,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:55,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021304281] [2022-02-15 13:35:55,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021304281] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:55,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737583591] [2022-02-15 13:35:55,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:35:55,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:55,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:55,354 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) [2022-02-15 13:35:55,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-02-15 13:35:55,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:35:55,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:55,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:55,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:55,411 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 41 treesize of output 35 [2022-02-15 13:35:55,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:35:55,597 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:35:55,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:56,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:56,064 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 120 treesize of output 104 [2022-02-15 13:35:56,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:56,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:35:56,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:56,127 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 25 treesize of output 27 [2022-02-15 13:35:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:35:56,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737583591] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:56,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:56,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:35:56,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199916324] [2022-02-15 13:35:56,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:56,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:35:56,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:56,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:35:56,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:35:56,137 INFO L87 Difference]: Start difference. First operand 2099 states and 6873 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) [2022-02-15 13:35:56,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:56,699 INFO L93 Difference]: Finished difference Result 3252 states and 10332 transitions. [2022-02-15 13:35:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:35:56,699 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 24 [2022-02-15 13:35:56,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:56,704 INFO L225 Difference]: With dead ends: 3252 [2022-02-15 13:35:56,704 INFO L226 Difference]: Without dead ends: 3176 [2022-02-15 13:35:56,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:35:56,705 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 175 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:56,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 345 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:35:56,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2022-02-15 13:35:56,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2087. [2022-02-15 13:35:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 2086 states have (on average 3.2813998082454456) internal successors, (6845), 2086 states have internal predecessors, (6845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 6845 transitions. [2022-02-15 13:35:56,735 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 6845 transitions. Word has length 24 [2022-02-15 13:35:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:56,735 INFO L470 AbstractCegarLoop]: Abstraction has 2087 states and 6845 transitions. [2022-02-15 13:35:56,736 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) [2022-02-15 13:35:56,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 6845 transitions. [2022-02-15 13:35:56,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:56,738 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:56,738 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:56,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:56,954 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,SelfDestructingSolverStorable335 [2022-02-15 13:35:56,954 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:56,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1771411239, now seen corresponding path program 321 times [2022-02-15 13:35:56,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:56,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678278858] [2022-02-15 13:35:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:56,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:57,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:57,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678278858] [2022-02-15 13:35:57,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678278858] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:57,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045515543] [2022-02-15 13:35:57,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:35:57,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:57,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:57,107 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) [2022-02-15 13:35:57,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-02-15 13:35:57,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:35:57,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:57,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:35:57,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:57,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:57,192 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:57,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:57,499 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:35:57,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:57,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:35:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:57,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:58,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:58,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-02-15 13:35:58,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:58,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:35:58,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:58,104 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 25 treesize of output 27 [2022-02-15 13:35:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:58,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045515543] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:58,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:58,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:35:58,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664273736] [2022-02-15 13:35:58,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:58,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:35:58,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:58,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:35:58,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:35:58,119 INFO L87 Difference]: Start difference. First operand 2087 states and 6845 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2022-02-15 13:35:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:58,298 INFO L93 Difference]: Finished difference Result 2229 states and 7252 transitions. [2022-02-15 13:35:58,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:35:58,298 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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 24 [2022-02-15 13:35:58,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:58,302 INFO L225 Difference]: With dead ends: 2229 [2022-02-15 13:35:58,302 INFO L226 Difference]: Without dead ends: 2198 [2022-02-15 13:35:58,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:58,302 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:58,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 175 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 495 Invalid, 0 Unknown, 141 Unchecked, 0.2s Time] [2022-02-15 13:35:58,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2198 states. [2022-02-15 13:35:58,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2198 to 2085. [2022-02-15 13:35:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2085 states, 2084 states have (on average 3.2783109404990403) internal successors, (6832), 2084 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 6832 transitions. [2022-02-15 13:35:58,328 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 6832 transitions. Word has length 24 [2022-02-15 13:35:58,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:58,328 INFO L470 AbstractCegarLoop]: Abstraction has 2085 states and 6832 transitions. [2022-02-15 13:35:58,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 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) [2022-02-15 13:35:58,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 6832 transitions. [2022-02-15 13:35:58,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:58,331 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:58,331 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:58,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Forceful destruction successful, exit code 0 [2022-02-15 13:35:58,546 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,SelfDestructingSolverStorable336 [2022-02-15 13:35:58,546 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:35:58,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:35:58,546 INFO L85 PathProgramCache]: Analyzing trace with hash -302653575, now seen corresponding path program 322 times [2022-02-15 13:35:58,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:35:58,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152787798] [2022-02-15 13:35:58,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:35:58,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:35:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:35:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:58,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:35:58,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152787798] [2022-02-15 13:35:58,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152787798] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:35:58,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619794628] [2022-02-15 13:35:58,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:35:58,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:35:58,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:35:58,687 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) [2022-02-15 13:35:58,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-02-15 13:35:58,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:35:58,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:35:58,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:35:58,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:35:58,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:35:58,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:58,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 29 [2022-02-15 13:35:58,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:35:58,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 12 treesize of output 3 [2022-02-15 13:35:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:59,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:35:59,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:59,469 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 78 treesize of output 70 [2022-02-15 13:35:59,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:59,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:35:59,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:35:59,529 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 29 treesize of output 31 [2022-02-15 13:35:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:35:59,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619794628] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:35:59,544 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:35:59,544 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:35:59,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026474003] [2022-02-15 13:35:59,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:35:59,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:35:59,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:35:59,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:35:59,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:35:59,544 INFO L87 Difference]: Start difference. First operand 2085 states and 6832 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:59,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:35:59,942 INFO L93 Difference]: Finished difference Result 2557 states and 8358 transitions. [2022-02-15 13:35:59,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:35:59,942 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:35:59,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:35:59,946 INFO L225 Difference]: With dead ends: 2557 [2022-02-15 13:35:59,946 INFO L226 Difference]: Without dead ends: 2496 [2022-02-15 13:35:59,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:35:59,947 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 132 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:35:59,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 318 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 839 Invalid, 0 Unknown, 233 Unchecked, 0.3s Time] [2022-02-15 13:35:59,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2022-02-15 13:35:59,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2078. [2022-02-15 13:35:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2078 states, 2077 states have (on average 3.275397207510833) internal successors, (6803), 2077 states have internal predecessors, (6803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:59,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 6803 transitions. [2022-02-15 13:35:59,973 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 6803 transitions. Word has length 24 [2022-02-15 13:35:59,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:35:59,973 INFO L470 AbstractCegarLoop]: Abstraction has 2078 states and 6803 transitions. [2022-02-15 13:35:59,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:35:59,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 6803 transitions. [2022-02-15 13:35:59,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:35:59,976 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:35:59,976 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:35:59,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-02-15 13:36:00,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:00,190 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:00,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:00,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1394610485, now seen corresponding path program 323 times [2022-02-15 13:36:00,190 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:00,190 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860606080] [2022-02-15 13:36:00,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:00,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:00,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:00,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:00,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860606080] [2022-02-15 13:36:00,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860606080] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:00,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051786572] [2022-02-15 13:36:00,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:36:00,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:00,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:00,362 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) [2022-02-15 13:36:00,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-02-15 13:36:00,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:36:00,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:00,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:36:00,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:00,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:00,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:36:00,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:00,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:36:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:00,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:01,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:01,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 48 [2022-02-15 13:36:01,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:01,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:36:01,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:01,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:36:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:01,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051786572] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:01,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:01,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:36:01,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895344251] [2022-02-15 13:36:01,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:01,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:36:01,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:01,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:36:01,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:36:01,258 INFO L87 Difference]: Start difference. First operand 2078 states and 6803 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) [2022-02-15 13:36:01,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:01,796 INFO L93 Difference]: Finished difference Result 2661 states and 8526 transitions. [2022-02-15 13:36:01,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:36:01,796 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 24 [2022-02-15 13:36:01,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:01,800 INFO L225 Difference]: With dead ends: 2661 [2022-02-15 13:36:01,801 INFO L226 Difference]: Without dead ends: 2570 [2022-02-15 13:36:01,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:36:01,801 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 136 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:01,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 347 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 889 Invalid, 0 Unknown, 242 Unchecked, 0.3s Time] [2022-02-15 13:36:01,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2022-02-15 13:36:01,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2086. [2022-02-15 13:36:01,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 3.27673860911271) internal successors, (6832), 2085 states have internal predecessors, (6832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:01,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 6832 transitions. [2022-02-15 13:36:01,828 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 6832 transitions. Word has length 24 [2022-02-15 13:36:01,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:01,828 INFO L470 AbstractCegarLoop]: Abstraction has 2086 states and 6832 transitions. [2022-02-15 13:36:01,828 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) [2022-02-15 13:36:01,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 6832 transitions. [2022-02-15 13:36:01,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:01,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:01,831 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:01,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Forceful destruction successful, exit code 0 [2022-02-15 13:36:02,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:02,047 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:02,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:02,047 INFO L85 PathProgramCache]: Analyzing trace with hash 467311019, now seen corresponding path program 324 times [2022-02-15 13:36:02,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:02,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118082688] [2022-02-15 13:36:02,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:02,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:36:02,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:02,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118082688] [2022-02-15 13:36:02,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118082688] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:02,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214956149] [2022-02-15 13:36:02,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:36:02,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:02,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:02,265 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) [2022-02-15 13:36:02,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-02-15 13:36:02,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:36:02,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:02,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:36:02,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:02,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:36:02,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:02,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:36:02,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:02,581 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:36:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:36:02,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:03,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:03,302 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 87 treesize of output 81 [2022-02-15 13:36:03,414 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:03,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 109 [2022-02-15 13:36:03,419 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:03,419 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 101 treesize of output 85 [2022-02-15 13:36:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:36:03,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214956149] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:03,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:03,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:36:03,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003128293] [2022-02-15 13:36:03,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:03,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:36:03,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:03,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:36:03,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:36:03,478 INFO L87 Difference]: Start difference. First operand 2086 states and 6832 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:03,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:03,666 INFO L93 Difference]: Finished difference Result 2376 states and 7736 transitions. [2022-02-15 13:36:03,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:36:03,667 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:03,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:03,670 INFO L225 Difference]: With dead ends: 2376 [2022-02-15 13:36:03,671 INFO L226 Difference]: Without dead ends: 2349 [2022-02-15 13:36:03,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:36:03,671 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 87 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:03,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 192 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 521 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-02-15 13:36:03,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2022-02-15 13:36:03,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2090. [2022-02-15 13:36:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 2089 states have (on average 3.278602202010531) internal successors, (6849), 2089 states have internal predecessors, (6849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:03,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 6849 transitions. [2022-02-15 13:36:03,698 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 6849 transitions. Word has length 24 [2022-02-15 13:36:03,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:03,699 INFO L470 AbstractCegarLoop]: Abstraction has 2090 states and 6849 transitions. [2022-02-15 13:36:03,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:03,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 6849 transitions. [2022-02-15 13:36:03,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:03,701 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:03,701 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:03,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Forceful destruction successful, exit code 0 [2022-02-15 13:36:03,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:03,917 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:03,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:03,918 INFO L85 PathProgramCache]: Analyzing trace with hash -694889093, now seen corresponding path program 325 times [2022-02-15 13:36:03,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:03,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322943449] [2022-02-15 13:36:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:03,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:36:04,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:04,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322943449] [2022-02-15 13:36:04,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322943449] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:04,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954079676] [2022-02-15 13:36:04,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:36:04,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:04,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:04,101 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) [2022-02-15 13:36:04,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-02-15 13:36:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:04,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:36:04,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:04,170 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 41 treesize of output 35 [2022-02-15 13:36:04,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:04,314 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:36:04,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:04,316 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:36:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:36:04,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:04,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:04,873 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 48 treesize of output 48 [2022-02-15 13:36:04,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:04,930 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 78 treesize of output 72 [2022-02-15 13:36:04,934 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:04,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2022-02-15 13:36:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:36:04,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954079676] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:04,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:04,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:36:04,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573320281] [2022-02-15 13:36:04,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:04,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:36:04,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:04,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:36:04,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:36:04,968 INFO L87 Difference]: Start difference. First operand 2090 states and 6849 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:05,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:05,430 INFO L93 Difference]: Finished difference Result 2688 states and 8648 transitions. [2022-02-15 13:36:05,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:36:05,430 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:05,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:05,435 INFO L225 Difference]: With dead ends: 2688 [2022-02-15 13:36:05,435 INFO L226 Difference]: Without dead ends: 2674 [2022-02-15 13:36:05,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:36:05,435 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 95 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:05,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 351 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 574 Invalid, 0 Unknown, 226 Unchecked, 0.2s Time] [2022-02-15 13:36:05,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2022-02-15 13:36:05,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2110. [2022-02-15 13:36:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2110 states, 2109 states have (on average 3.2887624466571834) internal successors, (6936), 2109 states have internal predecessors, (6936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:05,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 6936 transitions. [2022-02-15 13:36:05,463 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 6936 transitions. Word has length 24 [2022-02-15 13:36:05,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:05,463 INFO L470 AbstractCegarLoop]: Abstraction has 2110 states and 6936 transitions. [2022-02-15 13:36:05,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:05,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 6936 transitions. [2022-02-15 13:36:05,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:05,484 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:05,484 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:05,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Forceful destruction successful, exit code 0 [2022-02-15 13:36:05,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:05,700 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:05,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:05,700 INFO L85 PathProgramCache]: Analyzing trace with hash -679428297, now seen corresponding path program 326 times [2022-02-15 13:36:05,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:05,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37642650] [2022-02-15 13:36:05,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:05,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:36:05,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:05,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37642650] [2022-02-15 13:36:05,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37642650] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:05,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734974779] [2022-02-15 13:36:05,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:36:05,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:05,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:05,903 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) [2022-02-15 13:36:05,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-02-15 13:36:05,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:36:05,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:05,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:36:05,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:05,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:36:06,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:06,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:36:06,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:06,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:36:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:36:06,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:06,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:06,931 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 87 treesize of output 81 [2022-02-15 13:36:07,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:07,065 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 126 treesize of output 110 [2022-02-15 13:36:07,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:07,070 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 102 treesize of output 86 [2022-02-15 13:36:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:36:07,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734974779] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:07,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:07,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:36:07,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076093344] [2022-02-15 13:36:07,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:07,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:36:07,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:07,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:36:07,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:36:07,162 INFO L87 Difference]: Start difference. First operand 2110 states and 6936 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:07,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:07,389 INFO L93 Difference]: Finished difference Result 2351 states and 7677 transitions. [2022-02-15 13:36:07,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:36:07,389 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:07,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:07,405 INFO L225 Difference]: With dead ends: 2351 [2022-02-15 13:36:07,405 INFO L226 Difference]: Without dead ends: 2344 [2022-02-15 13:36:07,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:36:07,406 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 76 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:07,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 200 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 510 Invalid, 0 Unknown, 16 Unchecked, 0.2s Time] [2022-02-15 13:36:07,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2022-02-15 13:36:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2112. [2022-02-15 13:36:07,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2112 states, 2111 states have (on average 3.289436286120322) internal successors, (6944), 2111 states have internal predecessors, (6944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:07,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 6944 transitions. [2022-02-15 13:36:07,430 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 6944 transitions. Word has length 24 [2022-02-15 13:36:07,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:07,430 INFO L470 AbstractCegarLoop]: Abstraction has 2112 states and 6944 transitions. [2022-02-15 13:36:07,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:07,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 6944 transitions. [2022-02-15 13:36:07,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:07,433 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:07,433 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:07,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Forceful destruction successful, exit code 0 [2022-02-15 13:36:07,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:07,649 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:07,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:07,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1787184625, now seen corresponding path program 327 times [2022-02-15 13:36:07,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:07,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654067081] [2022-02-15 13:36:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:07,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:36:07,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:07,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654067081] [2022-02-15 13:36:07,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654067081] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:07,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347537196] [2022-02-15 13:36:07,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:36:07,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:07,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:07,880 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) [2022-02-15 13:36:07,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-02-15 13:36:07,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:36:07,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:07,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:36:07,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:07,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:36:08,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:08,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 35 treesize of output 29 [2022-02-15 13:36:08,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:08,278 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:36:08,317 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:36:08,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:08,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:08,706 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 53 treesize of output 51 [2022-02-15 13:36:08,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:08,774 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 86 treesize of output 78 [2022-02-15 13:36:08,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:08,778 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 70 treesize of output 62 [2022-02-15 13:36:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:36:08,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347537196] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:08,826 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:08,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:36:08,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798840415] [2022-02-15 13:36:08,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:08,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:36:08,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:08,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:36:08,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:36:08,826 INFO L87 Difference]: Start difference. First operand 2112 states and 6944 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:09,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:09,203 INFO L93 Difference]: Finished difference Result 2864 states and 9124 transitions. [2022-02-15 13:36:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:36:09,204 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:09,208 INFO L225 Difference]: With dead ends: 2864 [2022-02-15 13:36:09,208 INFO L226 Difference]: Without dead ends: 2744 [2022-02-15 13:36:09,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:36:09,209 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 153 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 556 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:09,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 413 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 770 Invalid, 0 Unknown, 556 Unchecked, 0.2s Time] [2022-02-15 13:36:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2022-02-15 13:36:09,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2123. [2022-02-15 13:36:09,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 3.285108388312912) internal successors, (6971), 2122 states have internal predecessors, (6971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:09,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 6971 transitions. [2022-02-15 13:36:09,248 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 6971 transitions. Word has length 24 [2022-02-15 13:36:09,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:09,249 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 6971 transitions. [2022-02-15 13:36:09,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:09,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 6971 transitions. [2022-02-15 13:36:09,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:09,251 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:09,251 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:09,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Ended with exit code 0 [2022-02-15 13:36:09,466 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,SelfDestructingSolverStorable342 [2022-02-15 13:36:09,467 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:09,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:09,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1855486059, now seen corresponding path program 328 times [2022-02-15 13:36:09,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:09,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252316715] [2022-02-15 13:36:09,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:09,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:09,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:09,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252316715] [2022-02-15 13:36:09,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252316715] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:09,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771429408] [2022-02-15 13:36:09,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:36:09,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:09,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:09,703 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) [2022-02-15 13:36:09,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-02-15 13:36:09,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:36:09,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:09,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:36:09,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:09,800 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 41 treesize of output 35 [2022-02-15 13:36:09,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-15 13:36:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:10,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:10,760 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:10,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 53 [2022-02-15 13:36:10,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:10,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 80 [2022-02-15 13:36:10,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:10,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 64 [2022-02-15 13:36:10,911 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:10,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771429408] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:10,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:10,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:36:10,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546269933] [2022-02-15 13:36:10,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:10,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:36:10,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:10,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:36:10,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:36:10,912 INFO L87 Difference]: Start difference. First operand 2123 states and 6971 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:14,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:14,042 INFO L93 Difference]: Finished difference Result 4002 states and 11970 transitions. [2022-02-15 13:36:14,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:36:14,042 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:14,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:14,048 INFO L225 Difference]: With dead ends: 4002 [2022-02-15 13:36:14,048 INFO L226 Difference]: Without dead ends: 3704 [2022-02-15 13:36:14,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=533, Invalid=2223, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 13:36:14,049 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 337 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 1465 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:14,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 493 Invalid, 1525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1465 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 13:36:14,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2022-02-15 13:36:14,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 2098. [2022-02-15 13:36:14,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 3.3028135431568906) internal successors, (6926), 2097 states have internal predecessors, (6926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 6926 transitions. [2022-02-15 13:36:14,088 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 6926 transitions. Word has length 24 [2022-02-15 13:36:14,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:14,088 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 6926 transitions. [2022-02-15 13:36:14,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:14,088 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 6926 transitions. [2022-02-15 13:36:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:14,091 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:14,091 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:14,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Ended with exit code 0 [2022-02-15 13:36:14,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-02-15 13:36:14,295 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:14,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:14,295 INFO L85 PathProgramCache]: Analyzing trace with hash -755297753, now seen corresponding path program 329 times [2022-02-15 13:36:14,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:14,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381749535] [2022-02-15 13:36:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:14,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:14,525 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:14,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:14,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381749535] [2022-02-15 13:36:14,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381749535] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:14,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395495017] [2022-02-15 13:36:14,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:36:14,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:14,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:14,527 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) [2022-02-15 13:36:14,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-02-15 13:36:14,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:36:14,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:14,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:36:14,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:14,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:36:14,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:14,691 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:36:14,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:14,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:36:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:14,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:15,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:15,192 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 47 treesize of output 47 [2022-02-15 13:36:15,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:15,243 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 51 treesize of output 50 [2022-02-15 13:36:15,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:15,247 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 41 treesize of output 40 [2022-02-15 13:36:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:15,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395495017] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:15,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:15,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:36:15,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269356238] [2022-02-15 13:36:15,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:15,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:36:15,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:15,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:36:15,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:36:15,285 INFO L87 Difference]: Start difference. First operand 2098 states and 6926 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:15,928 INFO L93 Difference]: Finished difference Result 2412 states and 7764 transitions. [2022-02-15 13:36:15,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:36:15,928 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:15,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:15,932 INFO L225 Difference]: With dead ends: 2412 [2022-02-15 13:36:15,932 INFO L226 Difference]: Without dead ends: 2292 [2022-02-15 13:36:15,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=965, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:36:15,932 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 118 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:15,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 315 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 879 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2022-02-15 13:36:15,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2022-02-15 13:36:15,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 2100. [2022-02-15 13:36:15,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2099 states have (on average 3.3020485945688423) internal successors, (6931), 2099 states have internal predecessors, (6931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 6931 transitions. [2022-02-15 13:36:15,958 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 6931 transitions. Word has length 24 [2022-02-15 13:36:15,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:15,958 INFO L470 AbstractCegarLoop]: Abstraction has 2100 states and 6931 transitions. [2022-02-15 13:36:15,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:15,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 6931 transitions. [2022-02-15 13:36:15,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:15,961 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:15,961 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:15,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Ended with exit code 0 [2022-02-15 13:36:16,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-02-15 13:36:16,175 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:16,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:16,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1276650503, now seen corresponding path program 330 times [2022-02-15 13:36:16,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:16,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254694547] [2022-02-15 13:36:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:16,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:16,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:16,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254694547] [2022-02-15 13:36:16,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254694547] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:16,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931108476] [2022-02-15 13:36:16,278 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:36:16,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:16,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:16,279 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) [2022-02-15 13:36:16,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-02-15 13:36:16,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:36:16,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:16,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:36:16,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:16,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:36:16,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:36:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:16,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:16,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:16,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-02-15 13:36:16,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:16,951 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 123 treesize of output 107 [2022-02-15 13:36:16,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:16,955 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 99 treesize of output 83 [2022-02-15 13:36:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:16,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931108476] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:16,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:16,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:36:16,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483751505] [2022-02-15 13:36:16,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:16,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:36:16,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:16,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:36:16,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:36:16,995 INFO L87 Difference]: Start difference. First operand 2100 states and 6931 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:17,671 INFO L93 Difference]: Finished difference Result 2664 states and 8633 transitions. [2022-02-15 13:36:17,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:36:17,671 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:17,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:17,675 INFO L225 Difference]: With dead ends: 2664 [2022-02-15 13:36:17,675 INFO L226 Difference]: Without dead ends: 2602 [2022-02-15 13:36:17,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:36:17,676 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 130 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:17,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 302 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:36:17,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2022-02-15 13:36:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2090. [2022-02-15 13:36:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 2089 states have (on average 3.3044518908568694) internal successors, (6903), 2089 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:17,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 6903 transitions. [2022-02-15 13:36:17,703 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 6903 transitions. Word has length 24 [2022-02-15 13:36:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:17,703 INFO L470 AbstractCegarLoop]: Abstraction has 2090 states and 6903 transitions. [2022-02-15 13:36:17,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 25 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:17,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 6903 transitions. [2022-02-15 13:36:17,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:17,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:17,705 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:17,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Forceful destruction successful, exit code 0 [2022-02-15 13:36:17,921 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,SelfDestructingSolverStorable345 [2022-02-15 13:36:17,921 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:17,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:17,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1699679631, now seen corresponding path program 331 times [2022-02-15 13:36:17,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:17,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517870949] [2022-02-15 13:36:17,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:17,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:18,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:18,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517870949] [2022-02-15 13:36:18,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517870949] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:18,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377818182] [2022-02-15 13:36:18,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:36:18,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:18,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:18,155 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) [2022-02-15 13:36:18,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-02-15 13:36:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:18,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:36:18,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:18,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:18,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:36:18,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:18,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 [2022-02-15 13:36:18,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:18,447 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-02-15 13:36:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:18,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:19,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:19,043 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 133 treesize of output 123 [2022-02-15 13:36:19,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:19,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 74 [2022-02-15 13:36:19,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:19,256 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 66 treesize of output 58 [2022-02-15 13:36:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:19,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377818182] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:19,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:19,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:36:19,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776608616] [2022-02-15 13:36:19,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:19,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:36:19,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:19,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:36:19,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:36:19,297 INFO L87 Difference]: Start difference. First operand 2090 states and 6903 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:19,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:19,500 INFO L93 Difference]: Finished difference Result 2343 states and 7546 transitions. [2022-02-15 13:36:19,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:36:19,500 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:19,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:19,504 INFO L225 Difference]: With dead ends: 2343 [2022-02-15 13:36:19,504 INFO L226 Difference]: Without dead ends: 2249 [2022-02-15 13:36:19,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:36:19,504 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:19,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 255 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 440 Invalid, 0 Unknown, 171 Unchecked, 0.1s Time] [2022-02-15 13:36:19,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2022-02-15 13:36:19,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 2098. [2022-02-15 13:36:19,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 3.3056747734859324) internal successors, (6932), 2097 states have internal predecessors, (6932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 6932 transitions. [2022-02-15 13:36:19,528 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 6932 transitions. Word has length 24 [2022-02-15 13:36:19,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:19,528 INFO L470 AbstractCegarLoop]: Abstraction has 2098 states and 6932 transitions. [2022-02-15 13:36:19,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:19,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 6932 transitions. [2022-02-15 13:36:19,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:19,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:19,530 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:19,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Forceful destruction successful, exit code 0 [2022-02-15 13:36:19,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:19,743 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:19,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:19,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1996983217, now seen corresponding path program 332 times [2022-02-15 13:36:19,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:19,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489637674] [2022-02-15 13:36:19,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:19,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:19,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:19,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489637674] [2022-02-15 13:36:19,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489637674] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:19,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087383029] [2022-02-15 13:36:19,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:36:19,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:19,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:19,905 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) [2022-02-15 13:36:19,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-02-15 13:36:19,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:36:19,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:19,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:36:19,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:20,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:20,020 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:36:20,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:20,136 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:36:20,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:20,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 treesize of output 7 [2022-02-15 13:36:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:20,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:20,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:20,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2022-02-15 13:36:20,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:20,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-02-15 13:36:20,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:20,842 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 99 treesize of output 83 [2022-02-15 13:36:20,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:20,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087383029] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:20,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:20,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:36:20,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063695449] [2022-02-15 13:36:20,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:20,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:36:20,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:20,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:36:20,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:36:20,888 INFO L87 Difference]: Start difference. First operand 2098 states and 6932 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:21,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:21,100 INFO L93 Difference]: Finished difference Result 2331 states and 7639 transitions. [2022-02-15 13:36:21,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:36:21,100 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:21,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:21,104 INFO L225 Difference]: With dead ends: 2331 [2022-02-15 13:36:21,104 INFO L226 Difference]: Without dead ends: 2273 [2022-02-15 13:36:21,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:36:21,104 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:21,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 167 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 471 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-02-15 13:36:21,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2022-02-15 13:36:21,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 2095. [2022-02-15 13:36:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2095 states, 2094 states have (on average 3.3046800382043937) internal successors, (6920), 2094 states have internal predecessors, (6920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2095 states to 2095 states and 6920 transitions. [2022-02-15 13:36:21,130 INFO L78 Accepts]: Start accepts. Automaton has 2095 states and 6920 transitions. Word has length 24 [2022-02-15 13:36:21,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:21,130 INFO L470 AbstractCegarLoop]: Abstraction has 2095 states and 6920 transitions. [2022-02-15 13:36:21,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:21,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2095 states and 6920 transitions. [2022-02-15 13:36:21,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:21,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:21,133 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:21,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Ended with exit code 0 [2022-02-15 13:36:21,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:21,348 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:21,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:21,348 INFO L85 PathProgramCache]: Analyzing trace with hash -24157367, now seen corresponding path program 333 times [2022-02-15 13:36:21,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:21,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510879335] [2022-02-15 13:36:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:21,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:21,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:21,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:21,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510879335] [2022-02-15 13:36:21,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510879335] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:21,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736261388] [2022-02-15 13:36:21,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:36:21,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:21,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:21,470 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) [2022-02-15 13:36:21,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-02-15 13:36:21,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:36:21,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:21,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:36:21,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:21,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-15 13:36:21,583 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 26 treesize of output 22 [2022-02-15 13:36:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:21,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:21,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:21,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-15 13:36:21,948 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:36:21,949 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 50 treesize of output 42 [2022-02-15 13:36:21,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2022-02-15 13:36:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:21,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736261388] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:21,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:21,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:36:21,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799069395] [2022-02-15 13:36:21,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:21,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:36:21,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:21,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:36:21,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:36:21,957 INFO L87 Difference]: Start difference. First operand 2095 states and 6920 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:22,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:22,514 INFO L93 Difference]: Finished difference Result 2640 states and 8541 transitions. [2022-02-15 13:36:22,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:36:22,514 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:22,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:22,519 INFO L225 Difference]: With dead ends: 2640 [2022-02-15 13:36:22,519 INFO L226 Difference]: Without dead ends: 2567 [2022-02-15 13:36:22,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:36:22,519 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 241 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:22,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 222 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:36:22,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2567 states. [2022-02-15 13:36:22,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2567 to 2104. [2022-02-15 13:36:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 2103 states have (on average 3.302425106990014) internal successors, (6945), 2103 states have internal predecessors, (6945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 6945 transitions. [2022-02-15 13:36:22,546 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 6945 transitions. Word has length 24 [2022-02-15 13:36:22,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:22,546 INFO L470 AbstractCegarLoop]: Abstraction has 2104 states and 6945 transitions. [2022-02-15 13:36:22,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:22,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 6945 transitions. [2022-02-15 13:36:22,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:22,549 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:22,549 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:22,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Forceful destruction successful, exit code 0 [2022-02-15 13:36:22,764 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,SelfDestructingSolverStorable348 [2022-02-15 13:36:22,765 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:22,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:22,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2126417585, now seen corresponding path program 334 times [2022-02-15 13:36:22,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:22,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804679149] [2022-02-15 13:36:22,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:22,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:22,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:22,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804679149] [2022-02-15 13:36:22,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804679149] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:22,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287643904] [2022-02-15 13:36:22,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:36:22,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:22,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:22,868 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) [2022-02-15 13:36:22,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-02-15 13:36:22,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:36:22,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:22,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:36:22,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:22,970 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 47 treesize of output 39 [2022-02-15 13:36:23,073 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 36 treesize of output 28 [2022-02-15 13:36:23,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-15 13:36:23,149 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:23,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:23,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:23,481 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 36 treesize of output 38 [2022-02-15 13:36:23,621 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:36:23,621 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 78 treesize of output 65 [2022-02-15 13:36:23,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 46 [2022-02-15 13:36:23,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:23,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287643904] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:23,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:23,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:36:23,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038933575] [2022-02-15 13:36:23,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:23,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:36:23,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:23,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:36:23,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:36:23,646 INFO L87 Difference]: Start difference. First operand 2104 states and 6945 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:25,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:25,322 INFO L93 Difference]: Finished difference Result 3242 states and 10303 transitions. [2022-02-15 13:36:25,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 13:36:25,322 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:25,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:25,328 INFO L225 Difference]: With dead ends: 3242 [2022-02-15 13:36:25,328 INFO L226 Difference]: Without dead ends: 3093 [2022-02-15 13:36:25,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=467, Invalid=2185, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:36:25,328 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 238 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:25,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 405 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:36:25,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2022-02-15 13:36:25,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 2121. [2022-02-15 13:36:25,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 3.3) internal successors, (6996), 2120 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 6996 transitions. [2022-02-15 13:36:25,358 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 6996 transitions. Word has length 24 [2022-02-15 13:36:25,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:25,358 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 6996 transitions. [2022-02-15 13:36:25,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 6996 transitions. [2022-02-15 13:36:25,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:25,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:25,361 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:25,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Forceful destruction successful, exit code 0 [2022-02-15 13:36:25,563 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,SelfDestructingSolverStorable349 [2022-02-15 13:36:25,563 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:25,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:25,563 INFO L85 PathProgramCache]: Analyzing trace with hash -962484411, now seen corresponding path program 335 times [2022-02-15 13:36:25,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:25,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50249129] [2022-02-15 13:36:25,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:25,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:25,728 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:25,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50249129] [2022-02-15 13:36:25,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50249129] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:25,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145134705] [2022-02-15 13:36:25,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:36:25,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:25,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:25,730 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) [2022-02-15 13:36:25,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-02-15 13:36:25,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:36:25,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:25,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:36:25,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:25,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-15 13:36:25,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 47 [2022-02-15 13:36:25,902 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 17 treesize of output 13 [2022-02-15 13:36:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:25,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:26,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:26,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-02-15 13:36:26,460 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:36:26,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 99 [2022-02-15 13:36:26,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 72 [2022-02-15 13:36:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:26,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145134705] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:26,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:26,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:36:26,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850652408] [2022-02-15 13:36:26,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:26,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:36:26,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:26,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:36:26,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:36:26,482 INFO L87 Difference]: Start difference. First operand 2121 states and 6996 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:27,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:27,579 INFO L93 Difference]: Finished difference Result 2904 states and 9254 transitions. [2022-02-15 13:36:27,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:36:27,579 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:27,584 INFO L225 Difference]: With dead ends: 2904 [2022-02-15 13:36:27,584 INFO L226 Difference]: Without dead ends: 2799 [2022-02-15 13:36:27,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=410, Invalid=1752, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 13:36:27,584 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 206 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:27,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 362 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1119 Invalid, 0 Unknown, 137 Unchecked, 0.4s Time] [2022-02-15 13:36:27,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2022-02-15 13:36:27,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 2121. [2022-02-15 13:36:27,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 3.3) internal successors, (6996), 2120 states have internal predecessors, (6996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:27,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 6996 transitions. [2022-02-15 13:36:27,615 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 6996 transitions. Word has length 24 [2022-02-15 13:36:27,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:27,615 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 6996 transitions. [2022-02-15 13:36:27,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:27,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 6996 transitions. [2022-02-15 13:36:27,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:27,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:27,638 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:27,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-02-15 13:36:27,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:27,854 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:27,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:27,855 INFO L85 PathProgramCache]: Analyzing trace with hash 409259049, now seen corresponding path program 336 times [2022-02-15 13:36:27,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:27,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882610562] [2022-02-15 13:36:27,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:27,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:27,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:27,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882610562] [2022-02-15 13:36:27,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882610562] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:27,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666995437] [2022-02-15 13:36:27,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:36:27,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:27,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:27,976 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) [2022-02-15 13:36:27,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-02-15 13:36:28,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:36:28,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:28,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:36:28,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:28,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-15 13:36:28,163 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 26 treesize of output 22 [2022-02-15 13:36:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:28,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:28,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:28,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 57 [2022-02-15 13:36:28,720 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:36:28,720 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 50 treesize of output 42 [2022-02-15 13:36:28,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2022-02-15 13:36:28,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:28,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666995437] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:28,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:28,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:36:28,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180581728] [2022-02-15 13:36:28,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:28,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:36:28,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:28,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:36:28,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:36:28,730 INFO L87 Difference]: Start difference. First operand 2121 states and 6996 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:29,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:29,307 INFO L93 Difference]: Finished difference Result 2540 states and 8248 transitions. [2022-02-15 13:36:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:36:29,307 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:29,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:29,312 INFO L225 Difference]: With dead ends: 2540 [2022-02-15 13:36:29,312 INFO L226 Difference]: Without dead ends: 2481 [2022-02-15 13:36:29,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:36:29,312 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 145 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:29,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 242 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:36:29,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2022-02-15 13:36:29,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2123. [2022-02-15 13:36:29,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 3.300659754948162) internal successors, (7004), 2122 states have internal predecessors, (7004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:29,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 7004 transitions. [2022-02-15 13:36:29,341 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 7004 transitions. Word has length 24 [2022-02-15 13:36:29,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:29,341 INFO L470 AbstractCegarLoop]: Abstraction has 2123 states and 7004 transitions. [2022-02-15 13:36:29,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:29,341 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 7004 transitions. [2022-02-15 13:36:29,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:29,343 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:29,343 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:29,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Forceful destruction successful, exit code 0 [2022-02-15 13:36:29,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:29,559 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:29,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:29,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1573192223, now seen corresponding path program 337 times [2022-02-15 13:36:29,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:29,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451743648] [2022-02-15 13:36:29,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:29,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:29,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:29,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451743648] [2022-02-15 13:36:29,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451743648] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:29,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014040137] [2022-02-15 13:36:29,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:36:29,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:29,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:29,665 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) [2022-02-15 13:36:29,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-02-15 13:36:29,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:29,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:36:29,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:29,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-02-15 13:36:29,788 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 55 treesize of output 45 [2022-02-15 13:36:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:29,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:30,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:30,228 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 61 treesize of output 61 [2022-02-15 13:36:30,348 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:36:30,348 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 78 treesize of output 65 [2022-02-15 13:36:30,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 46 [2022-02-15 13:36:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:30,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014040137] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:30,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:30,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:36:30,390 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212463738] [2022-02-15 13:36:30,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:30,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:36:30,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:30,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:36:30,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:36:30,390 INFO L87 Difference]: Start difference. First operand 2123 states and 7004 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) [2022-02-15 13:36:32,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:32,327 INFO L93 Difference]: Finished difference Result 3263 states and 10226 transitions. [2022-02-15 13:36:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 13:36:32,327 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 24 [2022-02-15 13:36:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:32,332 INFO L225 Difference]: With dead ends: 3263 [2022-02-15 13:36:32,332 INFO L226 Difference]: Without dead ends: 3121 [2022-02-15 13:36:32,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=411, Invalid=1941, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 13:36:32,332 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 179 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:32,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 465 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:36:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2022-02-15 13:36:32,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2127. [2022-02-15 13:36:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 2126 states have (on average 3.3010348071495765) internal successors, (7018), 2126 states have internal predecessors, (7018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:32,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 7018 transitions. [2022-02-15 13:36:32,361 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 7018 transitions. Word has length 24 [2022-02-15 13:36:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:32,362 INFO L470 AbstractCegarLoop]: Abstraction has 2127 states and 7018 transitions. [2022-02-15 13:36:32,362 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) [2022-02-15 13:36:32,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 7018 transitions. [2022-02-15 13:36:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:32,364 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:32,364 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:32,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Forceful destruction successful, exit code 0 [2022-02-15 13:36:32,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:32,580 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:32,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:32,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1246157495, now seen corresponding path program 338 times [2022-02-15 13:36:32,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:32,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219347976] [2022-02-15 13:36:32,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:32,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:32,687 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:32,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219347976] [2022-02-15 13:36:32,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219347976] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:32,687 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239753818] [2022-02-15 13:36:32,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:36:32,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:32,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:32,688 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) [2022-02-15 13:36:32,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-02-15 13:36:32,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:36:32,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:32,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:36:32,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:32,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-15 13:36:32,788 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 42 treesize of output 36 [2022-02-15 13:36:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:32,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:33,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:33,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-02-15 13:36:33,417 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:36:33,418 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 50 treesize of output 42 [2022-02-15 13:36:33,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2022-02-15 13:36:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:33,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239753818] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:33,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:33,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:36:33,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748773432] [2022-02-15 13:36:33,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:33,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:36:33,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:33,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:36:33,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:36:33,428 INFO L87 Difference]: Start difference. First operand 2127 states and 7018 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:34,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:34,319 INFO L93 Difference]: Finished difference Result 2644 states and 8503 transitions. [2022-02-15 13:36:34,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:36:34,319 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:34,324 INFO L225 Difference]: With dead ends: 2644 [2022-02-15 13:36:34,324 INFO L226 Difference]: Without dead ends: 2560 [2022-02-15 13:36:34,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=330, Invalid=1562, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 13:36:34,324 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 198 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:34,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 250 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:36:34,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2022-02-15 13:36:34,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2131. [2022-02-15 13:36:34,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2130 states have (on average 3.3018779342723006) internal successors, (7033), 2130 states have internal predecessors, (7033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 7033 transitions. [2022-02-15 13:36:34,351 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 7033 transitions. Word has length 24 [2022-02-15 13:36:34,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:34,351 INFO L470 AbstractCegarLoop]: Abstraction has 2131 states and 7033 transitions. [2022-02-15 13:36:34,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:34,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 7033 transitions. [2022-02-15 13:36:34,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:34,354 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:34,354 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:34,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Forceful destruction successful, exit code 0 [2022-02-15 13:36:34,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2022-02-15 13:36:34,570 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:34,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:34,570 INFO L85 PathProgramCache]: Analyzing trace with hash -725300047, now seen corresponding path program 339 times [2022-02-15 13:36:34,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:34,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330144053] [2022-02-15 13:36:34,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:34,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:34,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:34,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330144053] [2022-02-15 13:36:34,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330144053] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:34,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434688362] [2022-02-15 13:36:34,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:36:34,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:34,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:34,694 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) [2022-02-15 13:36:34,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-02-15 13:36:34,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:36:34,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:34,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:36:34,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:34,766 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 39 treesize of output 33 [2022-02-15 13:36:34,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:36:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:34,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:35,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:35,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 57 [2022-02-15 13:36:35,228 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:36:35,228 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 50 treesize of output 42 [2022-02-15 13:36:35,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2022-02-15 13:36:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:35,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434688362] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:35,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:35,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:36:35,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509285924] [2022-02-15 13:36:35,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:35,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:36:35,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:35,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:36:35,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:36:35,238 INFO L87 Difference]: Start difference. First operand 2131 states and 7033 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:35,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:35,827 INFO L93 Difference]: Finished difference Result 2641 states and 8549 transitions. [2022-02-15 13:36:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:36:35,827 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:35,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:35,832 INFO L225 Difference]: With dead ends: 2641 [2022-02-15 13:36:35,832 INFO L226 Difference]: Without dead ends: 2582 [2022-02-15 13:36:35,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:36:35,832 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 156 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:35,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 235 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:36:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2022-02-15 13:36:35,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 2136. [2022-02-15 13:36:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2135 states have (on average 3.3021077283372366) internal successors, (7050), 2135 states have internal predecessors, (7050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:35,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 7050 transitions. [2022-02-15 13:36:35,880 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 7050 transitions. Word has length 24 [2022-02-15 13:36:35,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:35,880 INFO L470 AbstractCegarLoop]: Abstraction has 2136 states and 7050 transitions. [2022-02-15 13:36:35,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 7050 transitions. [2022-02-15 13:36:35,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:35,883 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:35,883 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:35,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Forceful destruction successful, exit code 0 [2022-02-15 13:36:36,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-02-15 13:36:36,098 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:36,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:36,099 INFO L85 PathProgramCache]: Analyzing trace with hash 438633127, now seen corresponding path program 340 times [2022-02-15 13:36:36,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:36,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271049027] [2022-02-15 13:36:36,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:36,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:36,227 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:36,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271049027] [2022-02-15 13:36:36,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271049027] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:36,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769329091] [2022-02-15 13:36:36,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:36:36,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:36,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:36,229 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) [2022-02-15 13:36:36,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-02-15 13:36:36,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:36:36,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:36,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:36:36,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:36,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-15 13:36:36,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 47 [2022-02-15 13:36:36,402 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 17 treesize of output 13 [2022-02-15 13:36:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:36,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:36,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:36,919 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 61 treesize of output 61 [2022-02-15 13:36:37,041 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:36:37,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 65 [2022-02-15 13:36:37,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 46 [2022-02-15 13:36:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:37,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769329091] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:37,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:37,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:36:37,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746998686] [2022-02-15 13:36:37,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:37,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:36:37,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:37,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:36:37,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:36:37,059 INFO L87 Difference]: Start difference. First operand 2136 states and 7050 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:38,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:38,608 INFO L93 Difference]: Finished difference Result 3458 states and 10787 transitions. [2022-02-15 13:36:38,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 13:36:38,609 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:38,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:38,614 INFO L225 Difference]: With dead ends: 3458 [2022-02-15 13:36:38,614 INFO L226 Difference]: Without dead ends: 3285 [2022-02-15 13:36:38,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=508, Invalid=2462, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 13:36:38,615 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 202 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:38,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 481 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1517 Invalid, 0 Unknown, 14 Unchecked, 0.5s Time] [2022-02-15 13:36:38,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3285 states. [2022-02-15 13:36:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3285 to 2140. [2022-02-15 13:36:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 3.300607760635811) internal successors, (7060), 2139 states have internal predecessors, (7060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:38,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 7060 transitions. [2022-02-15 13:36:38,647 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 7060 transitions. Word has length 24 [2022-02-15 13:36:38,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:38,647 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 7060 transitions. [2022-02-15 13:36:38,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:38,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 7060 transitions. [2022-02-15 13:36:38,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:38,649 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:38,649 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:38,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Forceful destruction successful, exit code 0 [2022-02-15 13:36:38,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-02-15 13:36:38,863 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:38,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:38,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1914250705, now seen corresponding path program 341 times [2022-02-15 13:36:38,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:38,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283227282] [2022-02-15 13:36:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:38,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:38,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:38,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283227282] [2022-02-15 13:36:38,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283227282] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:38,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023698323] [2022-02-15 13:36:38,971 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:36:38,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:38,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:38,972 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) [2022-02-15 13:36:38,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-02-15 13:36:39,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:36:39,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:39,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:36:39,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:39,073 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 29 treesize of output 23 [2022-02-15 13:36:39,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 13:36:39,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-02-15 13:36:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:39,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:39,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:39,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 76 [2022-02-15 13:36:39,616 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:36:39,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 99 [2022-02-15 13:36:39,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 72 [2022-02-15 13:36:39,639 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:39,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023698323] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:39,639 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:39,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:36:39,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753727747] [2022-02-15 13:36:39,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:39,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:36:39,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:39,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:36:39,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:36:39,640 INFO L87 Difference]: Start difference. First operand 2140 states and 7060 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:40,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:40,199 INFO L93 Difference]: Finished difference Result 2662 states and 8598 transitions. [2022-02-15 13:36:40,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:36:40,200 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:40,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:40,204 INFO L225 Difference]: With dead ends: 2662 [2022-02-15 13:36:40,204 INFO L226 Difference]: Without dead ends: 2619 [2022-02-15 13:36:40,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1303, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 13:36:40,205 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:40,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 366 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 829 Invalid, 0 Unknown, 155 Unchecked, 0.3s Time] [2022-02-15 13:36:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2022-02-15 13:36:40,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 2156. [2022-02-15 13:36:40,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 3.3020881670533644) internal successors, (7116), 2155 states have internal predecessors, (7116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 7116 transitions. [2022-02-15 13:36:40,236 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 7116 transitions. Word has length 24 [2022-02-15 13:36:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:40,236 INFO L470 AbstractCegarLoop]: Abstraction has 2156 states and 7116 transitions. [2022-02-15 13:36:40,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 7116 transitions. [2022-02-15 13:36:40,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:40,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:40,239 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:40,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Forceful destruction successful, exit code 0 [2022-02-15 13:36:40,444 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,SelfDestructingSolverStorable356 [2022-02-15 13:36:40,444 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:40,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:40,444 INFO L85 PathProgramCache]: Analyzing trace with hash -661183593, now seen corresponding path program 342 times [2022-02-15 13:36:40,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:40,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766360230] [2022-02-15 13:36:40,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:40,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:40,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:40,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766360230] [2022-02-15 13:36:40,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766360230] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:40,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18541061] [2022-02-15 13:36:40,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:36:40,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:40,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:40,584 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) [2022-02-15 13:36:40,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-02-15 13:36:40,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:36:40,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:40,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:36:40,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:40,677 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 29 treesize of output 23 [2022-02-15 13:36:40,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-02-15 13:36:40,709 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 12 treesize of output 8 [2022-02-15 13:36:40,802 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:40,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:41,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:41,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-02-15 13:36:41,314 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:36:41,315 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 80 treesize of output 67 [2022-02-15 13:36:41,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2022-02-15 13:36:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:41,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18541061] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:41,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:41,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:36:41,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597679455] [2022-02-15 13:36:41,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:41,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:36:41,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:41,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:36:41,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:36:41,334 INFO L87 Difference]: Start difference. First operand 2156 states and 7116 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:42,710 INFO L93 Difference]: Finished difference Result 3188 states and 10093 transitions. [2022-02-15 13:36:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 13:36:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:42,715 INFO L225 Difference]: With dead ends: 3188 [2022-02-15 13:36:42,716 INFO L226 Difference]: Without dead ends: 3046 [2022-02-15 13:36:42,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=459, Invalid=2193, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 13:36:42,716 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 190 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:42,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 469 Invalid, 1627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1571 Invalid, 0 Unknown, 14 Unchecked, 0.5s Time] [2022-02-15 13:36:42,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2022-02-15 13:36:42,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 2142. [2022-02-15 13:36:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 3.3017281644091545) internal successors, (7069), 2141 states have internal predecessors, (7069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:42,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 7069 transitions. [2022-02-15 13:36:42,751 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 7069 transitions. Word has length 24 [2022-02-15 13:36:42,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:42,751 INFO L470 AbstractCegarLoop]: Abstraction has 2142 states and 7069 transitions. [2022-02-15 13:36:42,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:42,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 7069 transitions. [2022-02-15 13:36:42,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:42,754 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:42,754 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:42,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Ended with exit code 0 [2022-02-15 13:36:42,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:42,970 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:42,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:42,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1604330619, now seen corresponding path program 343 times [2022-02-15 13:36:42,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:42,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522698742] [2022-02-15 13:36:42,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:42,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:43,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:43,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522698742] [2022-02-15 13:36:43,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522698742] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:43,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869931913] [2022-02-15 13:36:43,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:36:43,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:43,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:43,111 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) [2022-02-15 13:36:43,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-02-15 13:36:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:43,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:36:43,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:43,202 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 29 treesize of output 23 [2022-02-15 13:36:43,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-02-15 13:36:43,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-02-15 13:36:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:43,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:43,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:43,873 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 108 treesize of output 102 [2022-02-15 13:36:44,049 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:36:44,050 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 80 treesize of output 67 [2022-02-15 13:36:44,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2022-02-15 13:36:44,082 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:44,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869931913] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:44,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:44,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:36:44,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642280218] [2022-02-15 13:36:44,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:44,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:36:44,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:44,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:36:44,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:36:44,083 INFO L87 Difference]: Start difference. First operand 2142 states and 7069 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:46,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:46,346 INFO L93 Difference]: Finished difference Result 3620 states and 11336 transitions. [2022-02-15 13:36:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 13:36:46,347 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:46,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:46,353 INFO L225 Difference]: With dead ends: 3620 [2022-02-15 13:36:46,353 INFO L226 Difference]: Without dead ends: 3501 [2022-02-15 13:36:46,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=521, Invalid=2235, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 13:36:46,354 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 323 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:46,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 485 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1472 Invalid, 0 Unknown, 99 Unchecked, 0.7s Time] [2022-02-15 13:36:46,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3501 states. [2022-02-15 13:36:46,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3501 to 2151. [2022-02-15 13:36:46,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 3.30046511627907) internal successors, (7096), 2150 states have internal predecessors, (7096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:46,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 7096 transitions. [2022-02-15 13:36:46,392 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 7096 transitions. Word has length 24 [2022-02-15 13:36:46,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:46,392 INFO L470 AbstractCegarLoop]: Abstraction has 2151 states and 7096 transitions. [2022-02-15 13:36:46,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:46,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 7096 transitions. [2022-02-15 13:36:46,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:46,395 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:46,395 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:46,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Forceful destruction successful, exit code 0 [2022-02-15 13:36:46,610 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,SelfDestructingSolverStorable358 [2022-02-15 13:36:46,611 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:46,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:46,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1526194413, now seen corresponding path program 344 times [2022-02-15 13:36:46,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:46,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050330115] [2022-02-15 13:36:46,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:46,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:46,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:46,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050330115] [2022-02-15 13:36:46,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050330115] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:46,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396156633] [2022-02-15 13:36:46,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:36:46,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:46,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:46,776 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) [2022-02-15 13:36:46,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-02-15 13:36:46,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:36:46,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:46,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:36:46,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:46,843 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 21 treesize of output 17 [2022-02-15 13:36:46,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 13:36:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:46,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:47,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:47,289 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 108 treesize of output 102 [2022-02-15 13:36:47,480 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:36:47,480 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 52 treesize of output 44 [2022-02-15 13:36:47,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2022-02-15 13:36:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:47,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396156633] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:47,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:47,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:36:47,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7925367] [2022-02-15 13:36:47,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:47,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:36:47,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:47,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:36:47,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:36:47,491 INFO L87 Difference]: Start difference. First operand 2151 states and 7096 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:49,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:49,575 INFO L93 Difference]: Finished difference Result 3312 states and 10214 transitions. [2022-02-15 13:36:49,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 13:36:49,576 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:49,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:49,581 INFO L225 Difference]: With dead ends: 3312 [2022-02-15 13:36:49,581 INFO L226 Difference]: Without dead ends: 3073 [2022-02-15 13:36:49,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=561, Invalid=2195, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 13:36:49,582 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 252 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:49,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 400 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:36:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3073 states. [2022-02-15 13:36:49,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3073 to 2163. [2022-02-15 13:36:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 3.3001850138760407) internal successors, (7135), 2162 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:49,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 7135 transitions. [2022-02-15 13:36:49,617 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 7135 transitions. Word has length 24 [2022-02-15 13:36:49,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:49,617 INFO L470 AbstractCegarLoop]: Abstraction has 2163 states and 7135 transitions. [2022-02-15 13:36:49,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:49,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 7135 transitions. [2022-02-15 13:36:49,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:49,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:49,620 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:49,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Forceful destruction successful, exit code 0 [2022-02-15 13:36:49,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:49,837 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:49,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:49,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1200110901, now seen corresponding path program 345 times [2022-02-15 13:36:49,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:49,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911535971] [2022-02-15 13:36:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:49,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:49,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:49,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911535971] [2022-02-15 13:36:49,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911535971] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:49,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704163066] [2022-02-15 13:36:49,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:36:49,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:49,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:49,960 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) [2022-02-15 13:36:49,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-02-15 13:36:49,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-15 13:36:49,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:49,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:36:49,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:50,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:50,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:36:50,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:50,166 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2022-02-15 13:36:50,269 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:50,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:50,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:50,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2022-02-15 13:36:50,868 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:36:50,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2022-02-15 13:36:50,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2022-02-15 13:36:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:50,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704163066] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:50,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:50,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:36:50,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3909905] [2022-02-15 13:36:50,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:50,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:36:50,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:50,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:36:50,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:36:50,894 INFO L87 Difference]: Start difference. First operand 2163 states and 7135 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 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) [2022-02-15 13:36:51,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:51,711 INFO L93 Difference]: Finished difference Result 2720 states and 8773 transitions. [2022-02-15 13:36:51,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:36:51,711 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 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 24 [2022-02-15 13:36:51,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:51,715 INFO L225 Difference]: With dead ends: 2720 [2022-02-15 13:36:51,715 INFO L226 Difference]: Without dead ends: 2591 [2022-02-15 13:36:51,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=184, Invalid=1298, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:36:51,716 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 106 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:51,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 349 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 583 Invalid, 0 Unknown, 113 Unchecked, 0.3s Time] [2022-02-15 13:36:51,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2591 states. [2022-02-15 13:36:51,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2591 to 2166. [2022-02-15 13:36:51,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2165 states have (on average 3.2988452655889144) internal successors, (7142), 2165 states have internal predecessors, (7142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 7142 transitions. [2022-02-15 13:36:51,744 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 7142 transitions. Word has length 24 [2022-02-15 13:36:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:51,745 INFO L470 AbstractCegarLoop]: Abstraction has 2166 states and 7142 transitions. [2022-02-15 13:36:51,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 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) [2022-02-15 13:36:51,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 7142 transitions. [2022-02-15 13:36:51,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:51,747 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:51,747 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:51,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Ended with exit code 0 [2022-02-15 13:36:51,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:51,963 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:51,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:51,963 INFO L85 PathProgramCache]: Analyzing trace with hash -916437817, now seen corresponding path program 346 times [2022-02-15 13:36:51,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:51,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523188001] [2022-02-15 13:36:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:51,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:52,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:52,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523188001] [2022-02-15 13:36:52,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523188001] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:52,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028267465] [2022-02-15 13:36:52,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:36:52,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:52,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:52,232 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) [2022-02-15 13:36:52,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-02-15 13:36:52,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:36:52,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:52,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:36:52,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:52,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:52,393 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:36:52,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:52,463 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:36:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:52,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:53,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:53,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-15 13:36:53,513 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:36:53,513 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 70 treesize of output 59 [2022-02-15 13:36:53,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2022-02-15 13:36:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:53,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028267465] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:53,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:53,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:36:53,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929994592] [2022-02-15 13:36:53,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:53,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:36:53,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:53,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:36:53,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:36:53,542 INFO L87 Difference]: Start difference. First operand 2166 states and 7142 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:54,690 INFO L93 Difference]: Finished difference Result 2924 states and 9323 transitions. [2022-02-15 13:36:54,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 13:36:54,690 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:54,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:54,695 INFO L225 Difference]: With dead ends: 2924 [2022-02-15 13:36:54,695 INFO L226 Difference]: Without dead ends: 2744 [2022-02-15 13:36:54,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 13:36:54,696 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 173 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:54,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 373 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 499 Invalid, 0 Unknown, 220 Unchecked, 0.2s Time] [2022-02-15 13:36:54,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2022-02-15 13:36:54,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2174. [2022-02-15 13:36:54,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 2173 states have (on average 3.3032673722963644) internal successors, (7178), 2173 states have internal predecessors, (7178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:54,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 7178 transitions. [2022-02-15 13:36:54,726 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 7178 transitions. Word has length 24 [2022-02-15 13:36:54,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:54,726 INFO L470 AbstractCegarLoop]: Abstraction has 2174 states and 7178 transitions. [2022-02-15 13:36:54,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 7178 transitions. [2022-02-15 13:36:54,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:54,728 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:54,729 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:54,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Ended with exit code 0 [2022-02-15 13:36:54,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:54,944 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:54,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:54,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1110737035, now seen corresponding path program 347 times [2022-02-15 13:36:54,945 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:54,945 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843546606] [2022-02-15 13:36:54,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:54,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:54,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:36:55,219 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:55,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843546606] [2022-02-15 13:36:55,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843546606] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:55,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111175799] [2022-02-15 13:36:55,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:36:55,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:55,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:55,220 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) [2022-02-15 13:36:55,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-02-15 13:36:55,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:36:55,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:55,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:36:55,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:55,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:55,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:36:55,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:55,403 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:36:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:36:55,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:56,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:56,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 67 [2022-02-15 13:36:56,126 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:36:56,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-02-15 13:36:56,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2022-02-15 13:36:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:36:56,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111175799] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:56,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:56,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:36:56,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414539797] [2022-02-15 13:36:56,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:56,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:36:56,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:56,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:36:56,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:36:56,138 INFO L87 Difference]: Start difference. First operand 2174 states and 7178 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:56,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:56,932 INFO L93 Difference]: Finished difference Result 2670 states and 8891 transitions. [2022-02-15 13:36:56,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:36:56,932 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:36:56,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:56,937 INFO L225 Difference]: With dead ends: 2670 [2022-02-15 13:36:56,937 INFO L226 Difference]: Without dead ends: 2651 [2022-02-15 13:36:56,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:36:56,937 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 73 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:56,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 343 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 753 Invalid, 0 Unknown, 205 Unchecked, 0.3s Time] [2022-02-15 13:36:56,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2022-02-15 13:36:56,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2174. [2022-02-15 13:36:56,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 2173 states have (on average 3.3032673722963644) internal successors, (7178), 2173 states have internal predecessors, (7178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:56,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 7178 transitions. [2022-02-15 13:36:56,966 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 7178 transitions. Word has length 24 [2022-02-15 13:36:56,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:56,966 INFO L470 AbstractCegarLoop]: Abstraction has 2174 states and 7178 transitions. [2022-02-15 13:36:56,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:56,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 7178 transitions. [2022-02-15 13:36:56,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:56,969 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:56,969 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:56,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Forceful destruction successful, exit code 0 [2022-02-15 13:36:57,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:57,182 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:57,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:57,182 INFO L85 PathProgramCache]: Analyzing trace with hash -589708973, now seen corresponding path program 348 times [2022-02-15 13:36:57,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:57,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833523654] [2022-02-15 13:36:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:57,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:57,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:57,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833523654] [2022-02-15 13:36:57,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833523654] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:57,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405577027] [2022-02-15 13:36:57,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:36:57,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:57,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:57,367 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) [2022-02-15 13:36:57,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-02-15 13:36:57,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:36:57,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:36:57,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:36:57,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:57,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:57,517 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:36:57,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:57,685 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 47 treesize of output 41 [2022-02-15 13:36:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:57,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:36:58,203 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:36:58,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-02-15 13:36:58,436 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:36:58,436 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 120 treesize of output 99 [2022-02-15 13:36:58,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 72 [2022-02-15 13:36:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:58,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405577027] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:36:58,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:36:58,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-15 13:36:58,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231475233] [2022-02-15 13:36:58,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:36:58,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 13:36:58,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:36:58,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 13:36:58,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:36:58,465 INFO L87 Difference]: Start difference. First operand 2174 states and 7178 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 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) [2022-02-15 13:36:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:36:58,775 INFO L93 Difference]: Finished difference Result 2494 states and 8270 transitions. [2022-02-15 13:36:58,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:36:58,775 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 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 24 [2022-02-15 13:36:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:36:58,780 INFO L225 Difference]: With dead ends: 2494 [2022-02-15 13:36:58,780 INFO L226 Difference]: Without dead ends: 2459 [2022-02-15 13:36:58,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:36:58,780 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 488 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:36:58,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 283 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 466 Invalid, 0 Unknown, 488 Unchecked, 0.2s Time] [2022-02-15 13:36:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2022-02-15 13:36:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2174. [2022-02-15 13:36:58,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 2173 states have (on average 3.3032673722963644) internal successors, (7178), 2173 states have internal predecessors, (7178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:36:58,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 7178 transitions. [2022-02-15 13:36:58,810 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 7178 transitions. Word has length 24 [2022-02-15 13:36:58,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:36:58,810 INFO L470 AbstractCegarLoop]: Abstraction has 2174 states and 7178 transitions. [2022-02-15 13:36:58,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 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) [2022-02-15 13:36:58,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 7178 transitions. [2022-02-15 13:36:58,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:36:58,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:36:58,813 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:36:58,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Ended with exit code 0 [2022-02-15 13:36:59,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:59,029 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:36:59,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:36:59,029 INFO L85 PathProgramCache]: Analyzing trace with hash -306035889, now seen corresponding path program 349 times [2022-02-15 13:36:59,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:36:59,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191423682] [2022-02-15 13:36:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:36:59,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:36:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:59,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:59,288 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:36:59,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191423682] [2022-02-15 13:36:59,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191423682] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:36:59,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500589313] [2022-02-15 13:36:59,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:36:59,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:36:59,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:36:59,289 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) [2022-02-15 13:36:59,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-02-15 13:36:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:36:59,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:36:59,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:36:59,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:59,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:36:59,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:36:59,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:36:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:36:59,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:00,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:00,312 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 80 treesize of output 76 [2022-02-15 13:37:00,524 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:37:00,524 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 80 treesize of output 67 [2022-02-15 13:37:00,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2022-02-15 13:37:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:00,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500589313] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:00,554 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:00,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:37:00,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633128986] [2022-02-15 13:37:00,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:00,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:37:00,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:00,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:37:00,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:37:00,555 INFO L87 Difference]: Start difference. First operand 2174 states and 7178 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:01,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:01,927 INFO L93 Difference]: Finished difference Result 3041 states and 9688 transitions. [2022-02-15 13:37:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 13:37:01,927 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:37:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:01,932 INFO L225 Difference]: With dead ends: 3041 [2022-02-15 13:37:01,932 INFO L226 Difference]: Without dead ends: 2861 [2022-02-15 13:37:01,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=275, Invalid=1531, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 13:37:01,933 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 203 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:01,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 351 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 970 Invalid, 0 Unknown, 13 Unchecked, 0.4s Time] [2022-02-15 13:37:01,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2022-02-15 13:37:01,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2180. [2022-02-15 13:37:01,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 3.3083983478659937) internal successors, (7209), 2179 states have internal predecessors, (7209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:01,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 7209 transitions. [2022-02-15 13:37:01,964 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 7209 transitions. Word has length 24 [2022-02-15 13:37:01,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:01,964 INFO L470 AbstractCegarLoop]: Abstraction has 2180 states and 7209 transitions. [2022-02-15 13:37:01,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 7209 transitions. [2022-02-15 13:37:01,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:01,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:01,966 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:01,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:02,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2022-02-15 13:37:02,182 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:02,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:02,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1721138963, now seen corresponding path program 350 times [2022-02-15 13:37:02,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:02,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654145689] [2022-02-15 13:37:02,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:02,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:37:02,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:02,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654145689] [2022-02-15 13:37:02,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654145689] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:02,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482388817] [2022-02-15 13:37:02,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:37:02,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:02,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:02,347 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) [2022-02-15 13:37:02,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-02-15 13:37:02,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:37:02,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:02,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:02,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:02,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:02,440 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:37:02,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:02,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:37:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:37:02,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:02,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:02,948 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 77 treesize of output 75 [2022-02-15 13:37:03,066 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:37:03,066 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 42 treesize of output 35 [2022-02-15 13:37:03,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 22 [2022-02-15 13:37:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:37:03,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482388817] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:03,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:03,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:37:03,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722602379] [2022-02-15 13:37:03,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:03,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:37:03,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:03,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:37:03,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:37:03,077 INFO L87 Difference]: Start difference. First operand 2180 states and 7209 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:03,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:03,732 INFO L93 Difference]: Finished difference Result 2580 states and 8517 transitions. [2022-02-15 13:37:03,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:37:03,732 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:37:03,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:03,737 INFO L225 Difference]: With dead ends: 2580 [2022-02-15 13:37:03,737 INFO L226 Difference]: Without dead ends: 2561 [2022-02-15 13:37:03,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 13:37:03,737 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:03,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 301 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 761 Invalid, 0 Unknown, 163 Unchecked, 0.3s Time] [2022-02-15 13:37:03,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2022-02-15 13:37:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 2180. [2022-02-15 13:37:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 3.3083983478659937) internal successors, (7209), 2179 states have internal predecessors, (7209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:03,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 7209 transitions. [2022-02-15 13:37:03,763 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 7209 transitions. Word has length 24 [2022-02-15 13:37:03,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:03,763 INFO L470 AbstractCegarLoop]: Abstraction has 2180 states and 7209 transitions. [2022-02-15 13:37:03,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:03,763 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 7209 transitions. [2022-02-15 13:37:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:03,765 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:03,765 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:03,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:03,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:03,981 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:03,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:03,981 INFO L85 PathProgramCache]: Analyzing trace with hash 114698045, now seen corresponding path program 351 times [2022-02-15 13:37:03,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:03,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560901630] [2022-02-15 13:37:03,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:03,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:04,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:04,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560901630] [2022-02-15 13:37:04,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560901630] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:04,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775162352] [2022-02-15 13:37:04,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:37:04,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:04,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:04,227 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) [2022-02-15 13:37:04,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-02-15 13:37:04,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:37:04,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:04,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:04,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:04,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:04,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:37:04,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:04,487 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:37:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:04,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:05,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:05,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 121 [2022-02-15 13:37:05,416 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:37:05,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 45 [2022-02-15 13:37:05,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2022-02-15 13:37:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:05,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775162352] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:05,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:05,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:37:05,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890186286] [2022-02-15 13:37:05,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:05,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:37:05,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:05,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:37:05,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:37:05,430 INFO L87 Difference]: Start difference. First operand 2180 states and 7209 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:06,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:06,175 INFO L93 Difference]: Finished difference Result 2600 states and 8575 transitions. [2022-02-15 13:37:06,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:37:06,176 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:37:06,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:06,181 INFO L225 Difference]: With dead ends: 2600 [2022-02-15 13:37:06,181 INFO L226 Difference]: Without dead ends: 2565 [2022-02-15 13:37:06,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:37:06,182 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:06,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 294 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 530 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-02-15 13:37:06,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2022-02-15 13:37:06,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2180. [2022-02-15 13:37:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 3.3083983478659937) internal successors, (7209), 2179 states have internal predecessors, (7209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:06,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 7209 transitions. [2022-02-15 13:37:06,212 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 7209 transitions. Word has length 24 [2022-02-15 13:37:06,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:06,212 INFO L470 AbstractCegarLoop]: Abstraction has 2180 states and 7209 transitions. [2022-02-15 13:37:06,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:06,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 7209 transitions. [2022-02-15 13:37:06,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:06,215 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:06,215 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:06,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:06,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2022-02-15 13:37:06,431 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:06,431 INFO L85 PathProgramCache]: Analyzing trace with hash -733924427, now seen corresponding path program 352 times [2022-02-15 13:37:06,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:06,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946628108] [2022-02-15 13:37:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:06,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:06,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:06,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946628108] [2022-02-15 13:37:06,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946628108] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:06,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685133867] [2022-02-15 13:37:06,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:37:06,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:06,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:06,733 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) [2022-02-15 13:37:06,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-02-15 13:37:06,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:37:06,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:06,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:37:06,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:06,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:06,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:37:07,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:07,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-15 13:37:07,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-15 13:37:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:07,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:07,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:07,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 123 [2022-02-15 13:37:08,034 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:37:08,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 59 [2022-02-15 13:37:08,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2022-02-15 13:37:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:08,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685133867] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:08,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:08,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:37:08,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648876455] [2022-02-15 13:37:08,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:08,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:37:08,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:08,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:37:08,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:37:08,067 INFO L87 Difference]: Start difference. First operand 2180 states and 7209 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:08,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:08,201 INFO L93 Difference]: Finished difference Result 2578 states and 8519 transitions. [2022-02-15 13:37:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:37:08,202 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:37:08,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:08,206 INFO L225 Difference]: With dead ends: 2578 [2022-02-15 13:37:08,206 INFO L226 Difference]: Without dead ends: 2539 [2022-02-15 13:37:08,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:37:08,207 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:08,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 248 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2022-02-15 13:37:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2539 states. [2022-02-15 13:37:08,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2539 to 2180. [2022-02-15 13:37:08,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 3.3083983478659937) internal successors, (7209), 2179 states have internal predecessors, (7209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 7209 transitions. [2022-02-15 13:37:08,233 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 7209 transitions. Word has length 24 [2022-02-15 13:37:08,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:08,233 INFO L470 AbstractCegarLoop]: Abstraction has 2180 states and 7209 transitions. [2022-02-15 13:37:08,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:08,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 7209 transitions. [2022-02-15 13:37:08,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:08,236 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:08,236 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:08,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:08,446 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,SelfDestructingSolverStorable367 [2022-02-15 13:37:08,447 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:08,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:08,447 INFO L85 PathProgramCache]: Analyzing trace with hash 423248889, now seen corresponding path program 353 times [2022-02-15 13:37:08,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:08,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367455183] [2022-02-15 13:37:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:08,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:08,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:08,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367455183] [2022-02-15 13:37:08,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367455183] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:08,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136640331] [2022-02-15 13:37:08,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:37:08,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:08,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:08,711 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) [2022-02-15 13:37:08,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-02-15 13:37:08,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:37:08,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:08,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:08,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:08,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:08,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:37:08,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:08,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 36 [2022-02-15 13:37:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:09,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:09,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:09,582 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 101 treesize of output 95 [2022-02-15 13:37:09,852 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:37:09,852 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 120 treesize of output 99 [2022-02-15 13:37:09,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 72 [2022-02-15 13:37:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:09,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136640331] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:09,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:09,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:37:09,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145279894] [2022-02-15 13:37:09,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:09,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:37:09,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:09,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:37:09,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:37:09,874 INFO L87 Difference]: Start difference. First operand 2180 states and 7209 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:10,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:10,353 INFO L93 Difference]: Finished difference Result 2671 states and 8715 transitions. [2022-02-15 13:37:10,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:37:10,353 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:37:10,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:10,358 INFO L225 Difference]: With dead ends: 2671 [2022-02-15 13:37:10,358 INFO L226 Difference]: Without dead ends: 2597 [2022-02-15 13:37:10,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:37:10,358 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 122 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:10,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 210 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 464 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-02-15 13:37:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2022-02-15 13:37:10,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 2180. [2022-02-15 13:37:10,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 3.3083983478659937) internal successors, (7209), 2179 states have internal predecessors, (7209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:10,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 7209 transitions. [2022-02-15 13:37:10,389 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 7209 transitions. Word has length 24 [2022-02-15 13:37:10,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:10,389 INFO L470 AbstractCegarLoop]: Abstraction has 2180 states and 7209 transitions. [2022-02-15 13:37:10,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:10,389 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 7209 transitions. [2022-02-15 13:37:10,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:10,392 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:10,392 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:10,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:10,607 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,SelfDestructingSolverStorable368 [2022-02-15 13:37:10,608 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:10,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:10,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1844543555, now seen corresponding path program 354 times [2022-02-15 13:37:10,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:10,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812471930] [2022-02-15 13:37:10,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:10,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:10,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:37:10,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:10,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812471930] [2022-02-15 13:37:10,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812471930] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:10,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385777628] [2022-02-15 13:37:10,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:37:10,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:10,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:10,795 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) [2022-02-15 13:37:10,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-02-15 13:37:10,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:37:10,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:10,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-15 13:37:10,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:10,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:10,930 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:37:10,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:10,985 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 13:37:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:37:11,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:11,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:11,534 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 133 treesize of output 123 [2022-02-15 13:37:11,778 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:37:11,778 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 78 treesize of output 65 [2022-02-15 13:37:11,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 46 [2022-02-15 13:37:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:37:11,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385777628] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:11,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:11,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 28 [2022-02-15 13:37:11,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505570775] [2022-02-15 13:37:11,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:11,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:37:11,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:11,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:37:11,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:37:11,799 INFO L87 Difference]: Start difference. First operand 2180 states and 7209 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:12,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:12,583 INFO L93 Difference]: Finished difference Result 2646 states and 8736 transitions. [2022-02-15 13:37:12,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:37:12,584 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:37:12,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:12,588 INFO L225 Difference]: With dead ends: 2646 [2022-02-15 13:37:12,588 INFO L226 Difference]: Without dead ends: 2581 [2022-02-15 13:37:12,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:37:12,588 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 139 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:12,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 315 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 748 Invalid, 0 Unknown, 354 Unchecked, 0.3s Time] [2022-02-15 13:37:12,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2581 states. [2022-02-15 13:37:12,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2581 to 2180. [2022-02-15 13:37:12,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 3.3083983478659937) internal successors, (7209), 2179 states have internal predecessors, (7209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:12,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 7209 transitions. [2022-02-15 13:37:12,614 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 7209 transitions. Word has length 24 [2022-02-15 13:37:12,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:12,615 INFO L470 AbstractCegarLoop]: Abstraction has 2180 states and 7209 transitions. [2022-02-15 13:37:12,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:12,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 7209 transitions. [2022-02-15 13:37:12,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:12,617 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:12,617 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:12,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:12,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:12,833 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:12,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:12,833 INFO L85 PathProgramCache]: Analyzing trace with hash -445275791, now seen corresponding path program 355 times [2022-02-15 13:37:12,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:12,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655541658] [2022-02-15 13:37:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:12,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:13,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:13,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655541658] [2022-02-15 13:37:13,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655541658] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:13,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841926337] [2022-02-15 13:37:13,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:37:13,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:13,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:13,084 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) [2022-02-15 13:37:13,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-02-15 13:37:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:13,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:37:13,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:13,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:13,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:37:13,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:13,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 53 [2022-02-15 13:37:13,336 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 15 treesize of output 11 [2022-02-15 13:37:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:13,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:13,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:13,716 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 133 treesize of output 123 [2022-02-15 13:37:13,924 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:37:13,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 59 [2022-02-15 13:37:13,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2022-02-15 13:37:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:13,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841926337] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:13,955 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:13,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:37:13,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784250035] [2022-02-15 13:37:13,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:13,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:37:13,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:13,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:37:13,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:37:13,955 INFO L87 Difference]: Start difference. First operand 2180 states and 7209 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:14,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:14,057 INFO L93 Difference]: Finished difference Result 2483 states and 8222 transitions. [2022-02-15 13:37:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:37:14,057 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:37:14,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:14,061 INFO L225 Difference]: With dead ends: 2483 [2022-02-15 13:37:14,061 INFO L226 Difference]: Without dead ends: 2444 [2022-02-15 13:37:14,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:37:14,061 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:14,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 308 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 292 Invalid, 0 Unknown, 299 Unchecked, 0.1s Time] [2022-02-15 13:37:14,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2022-02-15 13:37:14,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2182. [2022-02-15 13:37:14,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 3.307657038055938) internal successors, (7214), 2181 states have internal predecessors, (7214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:14,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 7214 transitions. [2022-02-15 13:37:14,086 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 7214 transitions. Word has length 24 [2022-02-15 13:37:14,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:14,086 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 7214 transitions. [2022-02-15 13:37:14,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:14,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 7214 transitions. [2022-02-15 13:37:14,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:14,089 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:14,089 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:14,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Ended with exit code 0 [2022-02-15 13:37:14,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:14,304 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:14,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:14,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1543701195, now seen corresponding path program 356 times [2022-02-15 13:37:14,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:14,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087340627] [2022-02-15 13:37:14,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:14,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:14,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:14,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087340627] [2022-02-15 13:37:14,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087340627] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:14,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781172420] [2022-02-15 13:37:14,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:37:14,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:14,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:14,479 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) [2022-02-15 13:37:14,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-02-15 13:37:14,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:37:14,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:14,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:14,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:14,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:14,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:37:14,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:14,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 [2022-02-15 13:37:14,632 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 15 treesize of output 11 [2022-02-15 13:37:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:14,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:15,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:15,036 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 129 treesize of output 119 [2022-02-15 13:37:15,226 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:37:15,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 36 [2022-02-15 13:37:15,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2022-02-15 13:37:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:15,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781172420] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:15,238 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:15,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:37:15,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521520670] [2022-02-15 13:37:15,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:15,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:37:15,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:15,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:37:15,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:37:15,239 INFO L87 Difference]: Start difference. First operand 2182 states and 7214 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:15,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:15,594 INFO L93 Difference]: Finished difference Result 2537 states and 8304 transitions. [2022-02-15 13:37:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:37:15,594 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:37:15,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:15,598 INFO L225 Difference]: With dead ends: 2537 [2022-02-15 13:37:15,598 INFO L226 Difference]: Without dead ends: 2463 [2022-02-15 13:37:15,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:37:15,598 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 85 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 263 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:15,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 259 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 412 Invalid, 0 Unknown, 263 Unchecked, 0.2s Time] [2022-02-15 13:37:15,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2022-02-15 13:37:15,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 2182. [2022-02-15 13:37:15,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 3.307657038055938) internal successors, (7214), 2181 states have internal predecessors, (7214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:15,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 7214 transitions. [2022-02-15 13:37:15,623 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 7214 transitions. Word has length 24 [2022-02-15 13:37:15,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:15,623 INFO L470 AbstractCegarLoop]: Abstraction has 2182 states and 7214 transitions. [2022-02-15 13:37:15,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 7214 transitions. [2022-02-15 13:37:15,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:15,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:15,626 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:15,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:15,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:15,841 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:15,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:15,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1326952907, now seen corresponding path program 357 times [2022-02-15 13:37:15,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:15,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245582087] [2022-02-15 13:37:15,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:15,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:37:16,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:16,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245582087] [2022-02-15 13:37:16,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245582087] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:16,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669357251] [2022-02-15 13:37:16,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:37:16,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:16,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:16,090 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) [2022-02-15 13:37:16,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-02-15 13:37:16,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:37:16,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:16,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:37:16,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:16,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:16,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:37:16,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:16,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 [2022-02-15 13:37:16,287 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 15 treesize of output 11 [2022-02-15 13:37:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:37:16,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:16,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:16,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 123 [2022-02-15 13:37:16,973 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-15 13:37:16,974 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 70 treesize of output 59 [2022-02-15 13:37:16,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2022-02-15 13:37:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:37:16,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669357251] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:16,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:16,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-15 13:37:16,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184531249] [2022-02-15 13:37:16,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:16,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 13:37:16,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:16,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 13:37:16,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:37:16,992 INFO L87 Difference]: Start difference. First operand 2182 states and 7214 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:17,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:17,189 INFO L93 Difference]: Finished difference Result 2459 states and 8143 transitions. [2022-02-15 13:37:17,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:37:17,189 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:37:17,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:17,194 INFO L225 Difference]: With dead ends: 2459 [2022-02-15 13:37:17,194 INFO L226 Difference]: Without dead ends: 2425 [2022-02-15 13:37:17,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:37:17,194 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:17,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 256 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 509 Invalid, 0 Unknown, 367 Unchecked, 0.2s Time] [2022-02-15 13:37:17,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-02-15 13:37:17,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2180. [2022-02-15 13:37:17,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 3.3083983478659937) internal successors, (7209), 2179 states have internal predecessors, (7209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:17,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 7209 transitions. [2022-02-15 13:37:17,221 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 7209 transitions. Word has length 24 [2022-02-15 13:37:17,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:17,221 INFO L470 AbstractCegarLoop]: Abstraction has 2180 states and 7209 transitions. [2022-02-15 13:37:17,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:17,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 7209 transitions. [2022-02-15 13:37:17,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:17,224 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:17,224 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:17,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Ended with exit code 0 [2022-02-15 13:37:17,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:17,433 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:17,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:17,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1374672095, now seen corresponding path program 358 times [2022-02-15 13:37:17,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:17,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679718287] [2022-02-15 13:37:17,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:17,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:17,602 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:17,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679718287] [2022-02-15 13:37:17,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679718287] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:17,602 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219109571] [2022-02-15 13:37:17,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:37:17,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:17,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:17,603 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) [2022-02-15 13:37:17,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-02-15 13:37:17,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:37:17,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:17,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:37:17,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:17,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:17,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 39 [2022-02-15 13:37:17,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:17,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:37:17,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-15 13:37:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:17,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:18,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:18,039 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 36 treesize of output 38 [2022-02-15 13:37:18,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:18,145 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 86 treesize of output 78 [2022-02-15 13:37:18,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:18,150 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 70 treesize of output 62 [2022-02-15 13:37:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:18,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219109571] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:18,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:18,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:37:18,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346228050] [2022-02-15 13:37:18,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:18,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:37:18,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:18,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:37:18,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:37:18,187 INFO L87 Difference]: Start difference. First operand 2180 states and 7209 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:18,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:18,611 INFO L93 Difference]: Finished difference Result 2599 states and 8340 transitions. [2022-02-15 13:37:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:37:18,611 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:37:18,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:18,615 INFO L225 Difference]: With dead ends: 2599 [2022-02-15 13:37:18,615 INFO L226 Difference]: Without dead ends: 2495 [2022-02-15 13:37:18,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:37:18,616 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 123 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:18,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 334 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 919 Invalid, 0 Unknown, 173 Unchecked, 0.3s Time] [2022-02-15 13:37:18,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2022-02-15 13:37:18,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2190. [2022-02-15 13:37:18,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.3051621745089084) internal successors, (7235), 2189 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:18,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7235 transitions. [2022-02-15 13:37:18,644 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7235 transitions. Word has length 24 [2022-02-15 13:37:18,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:18,644 INFO L470 AbstractCegarLoop]: Abstraction has 2190 states and 7235 transitions. [2022-02-15 13:37:18,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:18,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7235 transitions. [2022-02-15 13:37:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:18,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:18,647 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:18,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:18,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:18,863 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:18,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:18,863 INFO L85 PathProgramCache]: Analyzing trace with hash 818034983, now seen corresponding path program 359 times [2022-02-15 13:37:18,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:18,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970705883] [2022-02-15 13:37:18,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:18,863 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:18,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:18,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:18,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970705883] [2022-02-15 13:37:18,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970705883] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:18,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325695955] [2022-02-15 13:37:18,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:37:18,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:18,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:18,974 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) [2022-02-15 13:37:18,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-02-15 13:37:19,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:37:19,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:19,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:19,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:19,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:19,059 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-15 13:37:19,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:19,165 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:37:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:19,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:19,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:19,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-15 13:37:19,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:19,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-02-15 13:37:19,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:19,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2022-02-15 13:37:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:19,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325695955] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:19,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:19,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:37:19,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804144864] [2022-02-15 13:37:19,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:19,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:37:19,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:19,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:37:19,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:37:19,609 INFO L87 Difference]: Start difference. First operand 2190 states and 7235 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) [2022-02-15 13:37:19,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:19,952 INFO L93 Difference]: Finished difference Result 2391 states and 7771 transitions. [2022-02-15 13:37:19,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:37:19,952 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 24 [2022-02-15 13:37:19,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:19,956 INFO L225 Difference]: With dead ends: 2391 [2022-02-15 13:37:19,956 INFO L226 Difference]: Without dead ends: 2332 [2022-02-15 13:37:19,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:37:19,956 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 105 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:19,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 283 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 685 Invalid, 0 Unknown, 240 Unchecked, 0.2s Time] [2022-02-15 13:37:19,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2022-02-15 13:37:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2190. [2022-02-15 13:37:19,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.3051621745089084) internal successors, (7235), 2189 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:19,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7235 transitions. [2022-02-15 13:37:19,983 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7235 transitions. Word has length 24 [2022-02-15 13:37:19,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:19,983 INFO L470 AbstractCegarLoop]: Abstraction has 2190 states and 7235 transitions. [2022-02-15 13:37:19,984 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) [2022-02-15 13:37:19,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7235 transitions. [2022-02-15 13:37:19,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:19,986 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:19,986 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:20,002 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Ended with exit code 0 [2022-02-15 13:37:20,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:20,192 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:20,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:20,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1981968157, now seen corresponding path program 360 times [2022-02-15 13:37:20,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:20,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126534323] [2022-02-15 13:37:20,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:20,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:20,351 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:20,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:20,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126534323] [2022-02-15 13:37:20,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126534323] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:20,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351717328] [2022-02-15 13:37:20,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:37:20,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:20,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:20,353 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) [2022-02-15 13:37:20,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-02-15 13:37:20,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:37:20,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:20,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:37:20,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:20,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:20,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 39 [2022-02-15 13:37:20,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:20,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:37:20,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-15 13:37:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:20,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:20,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:20,974 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 36 treesize of output 38 [2022-02-15 13:37:21,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:21,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 78 [2022-02-15 13:37:21,083 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:21,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-02-15 13:37:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:21,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351717328] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:21,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:21,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:37:21,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514006154] [2022-02-15 13:37:21,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:21,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:37:21,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:21,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:37:21,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:37:21,125 INFO L87 Difference]: Start difference. First operand 2190 states and 7235 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:21,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:21,680 INFO L93 Difference]: Finished difference Result 2683 states and 8580 transitions. [2022-02-15 13:37:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:37:21,680 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:37:21,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:21,684 INFO L225 Difference]: With dead ends: 2683 [2022-02-15 13:37:21,684 INFO L226 Difference]: Without dead ends: 2607 [2022-02-15 13:37:21,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:37:21,685 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 109 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:21,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 306 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 988 Invalid, 0 Unknown, 76 Unchecked, 0.3s Time] [2022-02-15 13:37:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2022-02-15 13:37:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 2194. [2022-02-15 13:37:21,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2193 states have (on average 3.302781577747378) internal successors, (7243), 2193 states have internal predecessors, (7243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 7243 transitions. [2022-02-15 13:37:21,712 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 7243 transitions. Word has length 24 [2022-02-15 13:37:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:21,712 INFO L470 AbstractCegarLoop]: Abstraction has 2194 states and 7243 transitions. [2022-02-15 13:37:21,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:21,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 7243 transitions. [2022-02-15 13:37:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:21,715 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:21,715 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:21,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Ended with exit code 0 [2022-02-15 13:37:21,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2022-02-15 13:37:21,922 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:21,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:21,922 INFO L85 PathProgramCache]: Analyzing trace with hash 817525893, now seen corresponding path program 361 times [2022-02-15 13:37:21,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:21,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942425556] [2022-02-15 13:37:21,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:21,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:22,095 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:22,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942425556] [2022-02-15 13:37:22,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942425556] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:22,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180290226] [2022-02-15 13:37:22,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:37:22,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:22,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:22,096 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) [2022-02-15 13:37:22,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-02-15 13:37:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:22,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:22,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:22,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:22,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 39 [2022-02-15 13:37:22,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:22,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:37:22,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-15 13:37:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:22,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:22,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:22,703 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 64 treesize of output 62 [2022-02-15 13:37:22,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:22,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-02-15 13:37:22,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:22,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-02-15 13:37:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:22,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180290226] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:22,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:22,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:37:22,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159346656] [2022-02-15 13:37:22,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:22,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:37:22,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:22,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:37:22,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:37:22,896 INFO L87 Difference]: Start difference. First operand 2194 states and 7243 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:23,292 INFO L93 Difference]: Finished difference Result 2443 states and 7986 transitions. [2022-02-15 13:37:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:37:23,292 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:37:23,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:23,296 INFO L225 Difference]: With dead ends: 2443 [2022-02-15 13:37:23,296 INFO L226 Difference]: Without dead ends: 2408 [2022-02-15 13:37:23,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:37:23,297 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 76 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:23,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 277 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 865 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2022-02-15 13:37:23,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2022-02-15 13:37:23,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 2190. [2022-02-15 13:37:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.3051621745089084) internal successors, (7235), 2189 states have internal predecessors, (7235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:23,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7235 transitions. [2022-02-15 13:37:23,324 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7235 transitions. Word has length 24 [2022-02-15 13:37:23,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:23,324 INFO L470 AbstractCegarLoop]: Abstraction has 2190 states and 7235 transitions. [2022-02-15 13:37:23,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:23,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7235 transitions. [2022-02-15 13:37:23,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:23,326 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:23,327 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:23,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Ended with exit code 0 [2022-02-15 13:37:23,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2022-02-15 13:37:23,530 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:23,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:23,530 INFO L85 PathProgramCache]: Analyzing trace with hash -941255679, now seen corresponding path program 362 times [2022-02-15 13:37:23,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:23,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771791786] [2022-02-15 13:37:23,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:23,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:23,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:23,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771791786] [2022-02-15 13:37:23,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771791786] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:23,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608671297] [2022-02-15 13:37:23,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:37:23,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:23,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:23,715 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) [2022-02-15 13:37:23,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-02-15 13:37:23,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:37:23,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:23,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:23,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:23,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:23,806 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-02-15 13:37:23,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:23,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 22 [2022-02-15 13:37:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:23,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:24,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:24,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 57 [2022-02-15 13:37:24,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:24,403 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 53 treesize of output 50 [2022-02-15 13:37:24,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:24,407 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 41 treesize of output 38 [2022-02-15 13:37:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:24,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608671297] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:24,432 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:24,432 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:37:24,432 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924777424] [2022-02-15 13:37:24,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:24,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:37:24,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:24,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:37:24,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:37:24,433 INFO L87 Difference]: Start difference. First operand 2190 states and 7235 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:24,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:24,898 INFO L93 Difference]: Finished difference Result 2327 states and 7611 transitions. [2022-02-15 13:37:24,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:37:24,899 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:37:24,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:24,903 INFO L225 Difference]: With dead ends: 2327 [2022-02-15 13:37:24,903 INFO L226 Difference]: Without dead ends: 2268 [2022-02-15 13:37:24,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:37:24,903 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 67 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:24,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 280 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 727 Invalid, 0 Unknown, 111 Unchecked, 0.3s Time] [2022-02-15 13:37:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-02-15 13:37:24,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 2191. [2022-02-15 13:37:24,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2190 states have (on average 3.3054794520547945) internal successors, (7239), 2190 states have internal predecessors, (7239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:24,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 7239 transitions. [2022-02-15 13:37:24,930 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 7239 transitions. Word has length 24 [2022-02-15 13:37:24,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:24,930 INFO L470 AbstractCegarLoop]: Abstraction has 2191 states and 7239 transitions. [2022-02-15 13:37:24,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:24,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 7239 transitions. [2022-02-15 13:37:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:24,933 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:24,933 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:24,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:25,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2022-02-15 13:37:25,149 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:25,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:25,149 INFO L85 PathProgramCache]: Analyzing trace with hash 222677495, now seen corresponding path program 363 times [2022-02-15 13:37:25,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:25,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809334895] [2022-02-15 13:37:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:25,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:25,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:25,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809334895] [2022-02-15 13:37:25,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809334895] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:25,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111008920] [2022-02-15 13:37:25,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:37:25,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:25,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:25,307 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) [2022-02-15 13:37:25,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-02-15 13:37:25,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:37:25,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:25,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:25,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:25,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:25,403 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-15 13:37:25,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:25,436 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:37:25,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-02-15 13:37:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:25,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:25,774 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:25,774 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 77 treesize of output 75 [2022-02-15 13:37:25,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:25,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-02-15 13:37:25,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:25,967 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 99 treesize of output 83 [2022-02-15 13:37:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:26,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111008920] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:26,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:26,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:37:26,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250222806] [2022-02-15 13:37:26,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:26,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:37:26,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:26,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:37:26,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:37:26,030 INFO L87 Difference]: Start difference. First operand 2191 states and 7239 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:26,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:26,415 INFO L93 Difference]: Finished difference Result 2402 states and 7814 transitions. [2022-02-15 13:37:26,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:37:26,415 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:37:26,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:26,419 INFO L225 Difference]: With dead ends: 2402 [2022-02-15 13:37:26,419 INFO L226 Difference]: Without dead ends: 2309 [2022-02-15 13:37:26,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:37:26,419 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 80 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:26,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 246 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 735 Invalid, 0 Unknown, 120 Unchecked, 0.3s Time] [2022-02-15 13:37:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2022-02-15 13:37:26,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2193. [2022-02-15 13:37:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2193 states, 2192 states have (on average 3.3047445255474455) internal successors, (7244), 2192 states have internal predecessors, (7244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:26,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2193 states to 2193 states and 7244 transitions. [2022-02-15 13:37:26,444 INFO L78 Accepts]: Start accepts. Automaton has 2193 states and 7244 transitions. Word has length 24 [2022-02-15 13:37:26,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:26,444 INFO L470 AbstractCegarLoop]: Abstraction has 2193 states and 7244 transitions. [2022-02-15 13:37:26,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:26,444 INFO L276 IsEmpty]: Start isEmpty. Operand 2193 states and 7244 transitions. [2022-02-15 13:37:26,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:26,447 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:26,447 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:26,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:26,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable378,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:26,659 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:26,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:26,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1698295073, now seen corresponding path program 364 times [2022-02-15 13:37:26,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:26,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947187341] [2022-02-15 13:37:26,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:26,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:26,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:26,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947187341] [2022-02-15 13:37:26,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947187341] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:26,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835187486] [2022-02-15 13:37:26,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:37:26,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:26,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:26,768 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) [2022-02-15 13:37:26,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-02-15 13:37:26,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:37:26,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:26,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:37:26,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:26,875 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 29 treesize of output 23 [2022-02-15 13:37:26,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:26,908 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 44 [2022-02-15 13:37:26,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:26,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 55 treesize of output 35 [2022-02-15 13:37:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:26,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:27,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:27,321 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 108 treesize of output 102 [2022-02-15 13:37:27,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:27,517 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 81 treesize of output 73 [2022-02-15 13:37:27,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:27,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 57 [2022-02-15 13:37:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:27,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835187486] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:27,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:27,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:37:27,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108785602] [2022-02-15 13:37:27,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:27,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:37:27,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:27,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:37:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:37:27,557 INFO L87 Difference]: Start difference. First operand 2193 states and 7244 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:28,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:28,248 INFO L93 Difference]: Finished difference Result 2450 states and 7918 transitions. [2022-02-15 13:37:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:37:28,248 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:37:28,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:28,252 INFO L225 Difference]: With dead ends: 2450 [2022-02-15 13:37:28,252 INFO L226 Difference]: Without dead ends: 2366 [2022-02-15 13:37:28,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1006, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:37:28,252 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 117 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:28,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 278 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 967 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2022-02-15 13:37:28,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2366 states. [2022-02-15 13:37:28,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2366 to 2201. [2022-02-15 13:37:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2201 states, 2200 states have (on average 3.3036363636363637) internal successors, (7268), 2200 states have internal predecessors, (7268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 7268 transitions. [2022-02-15 13:37:28,278 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 7268 transitions. Word has length 24 [2022-02-15 13:37:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:28,278 INFO L470 AbstractCegarLoop]: Abstraction has 2201 states and 7268 transitions. [2022-02-15 13:37:28,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 7268 transitions. [2022-02-15 13:37:28,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:28,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:28,281 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:28,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Ended with exit code 0 [2022-02-15 13:37:28,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:28,496 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:28,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:28,496 INFO L85 PathProgramCache]: Analyzing trace with hash 533852809, now seen corresponding path program 365 times [2022-02-15 13:37:28,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:28,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556935457] [2022-02-15 13:37:28,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:28,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:28,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:28,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556935457] [2022-02-15 13:37:28,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556935457] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:28,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741231643] [2022-02-15 13:37:28,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:37:28,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:28,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:28,644 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) [2022-02-15 13:37:28,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-02-15 13:37:28,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:37:28,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:28,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:28,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:28,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-02-15 13:37:28,758 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 69 treesize of output 59 [2022-02-15 13:37:28,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 49 [2022-02-15 13:37:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:28,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:29,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:29,143 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 78 treesize of output 76 [2022-02-15 13:37:29,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:29,321 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 126 treesize of output 110 [2022-02-15 13:37:29,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:29,325 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 102 treesize of output 86 [2022-02-15 13:37:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:29,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741231643] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:29,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:29,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-15 13:37:29,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313837169] [2022-02-15 13:37:29,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:29,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:37:29,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:29,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:37:29,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:37:29,364 INFO L87 Difference]: Start difference. First operand 2201 states and 7268 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) [2022-02-15 13:37:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:29,851 INFO L93 Difference]: Finished difference Result 2380 states and 7739 transitions. [2022-02-15 13:37:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:37:29,851 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 24 [2022-02-15 13:37:29,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:29,854 INFO L225 Difference]: With dead ends: 2380 [2022-02-15 13:37:29,855 INFO L226 Difference]: Without dead ends: 2306 [2022-02-15 13:37:29,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:37:29,855 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 101 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:29,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 185 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:37:29,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2022-02-15 13:37:29,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2197. [2022-02-15 13:37:29,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2197 states, 2196 states have (on average 3.3051001821493626) internal successors, (7258), 2196 states have internal predecessors, (7258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:29,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2197 states to 2197 states and 7258 transitions. [2022-02-15 13:37:29,878 INFO L78 Accepts]: Start accepts. Automaton has 2197 states and 7258 transitions. Word has length 24 [2022-02-15 13:37:29,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:29,878 INFO L470 AbstractCegarLoop]: Abstraction has 2197 states and 7258 transitions. [2022-02-15 13:37:29,879 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) [2022-02-15 13:37:29,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2197 states and 7258 transitions. [2022-02-15 13:37:29,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:29,881 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:29,881 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:29,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:30,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:30,097 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:30,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:30,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1210054435, now seen corresponding path program 366 times [2022-02-15 13:37:30,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:30,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140964380] [2022-02-15 13:37:30,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:30,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:30,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:30,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140964380] [2022-02-15 13:37:30,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140964380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:30,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563417248] [2022-02-15 13:37:30,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:37:30,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:30,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:30,206 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) [2022-02-15 13:37:30,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-02-15 13:37:30,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:37:30,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:30,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:30,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:30,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:30,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:37:30,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:30,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:37:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:30,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:30,728 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:30,728 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 55 treesize of output 53 [2022-02-15 13:37:30,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:30,787 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 58 treesize of output 55 [2022-02-15 13:37:30,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:30,791 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 46 treesize of output 43 [2022-02-15 13:37:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:30,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563417248] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:30,831 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:30,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:37:30,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082422731] [2022-02-15 13:37:30,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:30,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:37:30,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:30,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:37:30,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:37:30,832 INFO L87 Difference]: Start difference. First operand 2197 states and 7258 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:31,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:31,144 INFO L93 Difference]: Finished difference Result 2524 states and 8171 transitions. [2022-02-15 13:37:31,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:37:31,145 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:37:31,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:31,149 INFO L225 Difference]: With dead ends: 2524 [2022-02-15 13:37:31,149 INFO L226 Difference]: Without dead ends: 2475 [2022-02-15 13:37:31,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:37:31,149 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 83 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:31,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 328 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 599 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-02-15 13:37:31,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2022-02-15 13:37:31,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2218. [2022-02-15 13:37:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 3.2963464140730716) internal successors, (7308), 2217 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:31,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 7308 transitions. [2022-02-15 13:37:31,176 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 7308 transitions. Word has length 24 [2022-02-15 13:37:31,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:31,176 INFO L470 AbstractCegarLoop]: Abstraction has 2218 states and 7308 transitions. [2022-02-15 13:37:31,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:31,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 7308 transitions. [2022-02-15 13:37:31,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:31,180 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:31,181 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:31,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:31,396 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,SelfDestructingSolverStorable381 [2022-02-15 13:37:31,396 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:31,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:31,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1249012481, now seen corresponding path program 367 times [2022-02-15 13:37:31,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:31,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64528871] [2022-02-15 13:37:31,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:31,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:31,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:31,580 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:31,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64528871] [2022-02-15 13:37:31,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64528871] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:31,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211349176] [2022-02-15 13:37:31,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:37:31,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:31,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:31,581 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) [2022-02-15 13:37:31,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-02-15 13:37:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:31,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:37:31,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:31,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:31,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:37:31,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:31,873 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:37:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:31,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:32,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:32,165 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 53 treesize of output 51 [2022-02-15 13:37:32,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:32,221 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 81 treesize of output 73 [2022-02-15 13:37:32,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:32,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 57 [2022-02-15 13:37:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:32,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211349176] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:32,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:32,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:37:32,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018319975] [2022-02-15 13:37:32,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:32,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:37:32,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:32,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:37:32,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:37:32,270 INFO L87 Difference]: Start difference. First operand 2218 states and 7308 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:32,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:32,595 INFO L93 Difference]: Finished difference Result 2606 states and 8383 transitions. [2022-02-15 13:37:32,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:37:32,595 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:37:32,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:32,600 INFO L225 Difference]: With dead ends: 2606 [2022-02-15 13:37:32,600 INFO L226 Difference]: Without dead ends: 2556 [2022-02-15 13:37:32,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:37:32,600 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 109 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:32,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 301 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 626 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-02-15 13:37:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2022-02-15 13:37:32,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2211. [2022-02-15 13:37:32,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2210 states have (on average 3.3013574660633482) internal successors, (7296), 2210 states have internal predecessors, (7296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:32,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 7296 transitions. [2022-02-15 13:37:32,626 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 7296 transitions. Word has length 24 [2022-02-15 13:37:32,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:32,626 INFO L470 AbstractCegarLoop]: Abstraction has 2211 states and 7296 transitions. [2022-02-15 13:37:32,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:32,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 7296 transitions. [2022-02-15 13:37:32,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:32,628 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:32,628 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:32,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:32,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:32,841 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:32,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:32,841 INFO L85 PathProgramCache]: Analyzing trace with hash 982652643, now seen corresponding path program 368 times [2022-02-15 13:37:32,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:32,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28474277] [2022-02-15 13:37:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:32,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:33,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:33,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28474277] [2022-02-15 13:37:33,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28474277] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:33,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970598061] [2022-02-15 13:37:33,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:37:33,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:33,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:33,036 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) [2022-02-15 13:37:33,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-02-15 13:37:33,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:37:33,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:33,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:33,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:33,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:33,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:37:33,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:33,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:37:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:33,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:33,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:33,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 53 [2022-02-15 13:37:33,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:33,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-02-15 13:37:33,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:33,685 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 41 treesize of output 38 [2022-02-15 13:37:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:33,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970598061] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:33,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:33,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:37:33,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652154385] [2022-02-15 13:37:33,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:33,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:37:33,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:33,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:37:33,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:37:33,705 INFO L87 Difference]: Start difference. First operand 2211 states and 7296 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) [2022-02-15 13:37:34,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:34,006 INFO L93 Difference]: Finished difference Result 2432 states and 7878 transitions. [2022-02-15 13:37:34,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:37:34,007 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 24 [2022-02-15 13:37:34,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:34,011 INFO L225 Difference]: With dead ends: 2432 [2022-02-15 13:37:34,012 INFO L226 Difference]: Without dead ends: 2373 [2022-02-15 13:37:34,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:37:34,012 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 92 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:34,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 298 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 531 Invalid, 0 Unknown, 167 Unchecked, 0.2s Time] [2022-02-15 13:37:34,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2022-02-15 13:37:34,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2211. [2022-02-15 13:37:34,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2210 states have (on average 3.3013574660633482) internal successors, (7296), 2210 states have internal predecessors, (7296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:34,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 7296 transitions. [2022-02-15 13:37:34,038 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 7296 transitions. Word has length 24 [2022-02-15 13:37:34,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:34,038 INFO L470 AbstractCegarLoop]: Abstraction has 2211 states and 7296 transitions. [2022-02-15 13:37:34,039 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) [2022-02-15 13:37:34,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 7296 transitions. [2022-02-15 13:37:34,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:34,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:34,041 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:34,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:34,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:34,257 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:34,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:34,257 INFO L85 PathProgramCache]: Analyzing trace with hash 2146585817, now seen corresponding path program 369 times [2022-02-15 13:37:34,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:34,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671493896] [2022-02-15 13:37:34,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:34,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:34,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:34,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671493896] [2022-02-15 13:37:34,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671493896] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:34,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355187640] [2022-02-15 13:37:34,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:37:34,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:34,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:34,469 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) [2022-02-15 13:37:34,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-02-15 13:37:34,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:37:34,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:34,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:37:34,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:34,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:34,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:37:34,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:34,689 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:37:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:34,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:35,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:35,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 51 [2022-02-15 13:37:35,419 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:35,419 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 86 treesize of output 78 [2022-02-15 13:37:35,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:35,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-02-15 13:37:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:35,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355187640] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:35,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:35,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:37:35,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240854940] [2022-02-15 13:37:35,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:35,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:37:35,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:35,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:37:35,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:37:35,464 INFO L87 Difference]: Start difference. First operand 2211 states and 7296 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) [2022-02-15 13:37:36,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:36,022 INFO L93 Difference]: Finished difference Result 2643 states and 8443 transitions. [2022-02-15 13:37:36,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:37:36,022 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 24 [2022-02-15 13:37:36,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:36,026 INFO L225 Difference]: With dead ends: 2643 [2022-02-15 13:37:36,026 INFO L226 Difference]: Without dead ends: 2532 [2022-02-15 13:37:36,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:37:36,027 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 90 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:36,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 435 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 834 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-02-15 13:37:36,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2022-02-15 13:37:36,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2209. [2022-02-15 13:37:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 3.3020833333333335) internal successors, (7291), 2208 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:36,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 7291 transitions. [2022-02-15 13:37:36,054 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 7291 transitions. Word has length 24 [2022-02-15 13:37:36,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:36,054 INFO L470 AbstractCegarLoop]: Abstraction has 2209 states and 7291 transitions. [2022-02-15 13:37:36,054 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) [2022-02-15 13:37:36,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 7291 transitions. [2022-02-15 13:37:36,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:36,057 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:36,057 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:36,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:36,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:36,272 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:36,272 INFO L85 PathProgramCache]: Analyzing trace with hash -234912863, now seen corresponding path program 370 times [2022-02-15 13:37:36,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:36,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861613692] [2022-02-15 13:37:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:36,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:36,449 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:36,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:36,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861613692] [2022-02-15 13:37:36,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861613692] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:36,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413673052] [2022-02-15 13:37:36,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:37:36,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:36,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:36,450 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) [2022-02-15 13:37:36,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-02-15 13:37:36,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:37:36,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:36,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:37:36,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:36,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:36,524 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:37:36,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:37:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:36,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:37,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:37,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 51 [2022-02-15 13:37:37,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:37,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 73 [2022-02-15 13:37:37,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:37,140 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 65 treesize of output 57 [2022-02-15 13:37:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:37,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413673052] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:37,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:37,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-15 13:37:37,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212985132] [2022-02-15 13:37:37,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:37,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:37:37,207 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:37,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:37:37,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:37:37,208 INFO L87 Difference]: Start difference. First operand 2209 states and 7291 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) [2022-02-15 13:37:37,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:37,638 INFO L93 Difference]: Finished difference Result 2825 states and 8960 transitions. [2022-02-15 13:37:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:37:37,639 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 24 [2022-02-15 13:37:37,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:37,643 INFO L225 Difference]: With dead ends: 2825 [2022-02-15 13:37:37,643 INFO L226 Difference]: Without dead ends: 2721 [2022-02-15 13:37:37,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:37:37,644 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 160 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:37,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 283 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 640 Invalid, 0 Unknown, 115 Unchecked, 0.3s Time] [2022-02-15 13:37:37,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2022-02-15 13:37:37,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2247. [2022-02-15 13:37:37,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2247 states, 2246 states have (on average 3.296527159394479) internal successors, (7404), 2246 states have internal predecessors, (7404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:37,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 7404 transitions. [2022-02-15 13:37:37,676 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 7404 transitions. Word has length 24 [2022-02-15 13:37:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:37,676 INFO L470 AbstractCegarLoop]: Abstraction has 2247 states and 7404 transitions. [2022-02-15 13:37:37,676 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) [2022-02-15 13:37:37,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 7404 transitions. [2022-02-15 13:37:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:37,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:37,679 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:37,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Ended with exit code 0 [2022-02-15 13:37:37,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:37,895 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:37,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:37,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1142534045, now seen corresponding path program 371 times [2022-02-15 13:37:37,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:37,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386216091] [2022-02-15 13:37:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:37,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:38,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:38,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386216091] [2022-02-15 13:37:38,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386216091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:38,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690298735] [2022-02-15 13:37:38,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:37:38,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:38,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:38,126 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) [2022-02-15 13:37:38,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-02-15 13:37:38,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:37:38,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:38,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:38,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:38,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:38,194 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:37:38,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:38,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-15 13:37:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:38,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:38,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:38,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 53 [2022-02-15 13:37:39,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:39,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-02-15 13:37:39,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:39,009 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 46 treesize of output 43 [2022-02-15 13:37:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:39,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690298735] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:39,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:39,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:37:39,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859217398] [2022-02-15 13:37:39,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:39,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:37:39,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:39,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:37:39,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:37:39,061 INFO L87 Difference]: Start difference. First operand 2247 states and 7404 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:39,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:39,444 INFO L93 Difference]: Finished difference Result 2494 states and 8092 transitions. [2022-02-15 13:37:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:37:39,444 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:37:39,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:39,448 INFO L225 Difference]: With dead ends: 2494 [2022-02-15 13:37:39,448 INFO L226 Difference]: Without dead ends: 2435 [2022-02-15 13:37:39,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:37:39,449 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 132 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 519 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:39,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 351 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 726 Invalid, 0 Unknown, 519 Unchecked, 0.2s Time] [2022-02-15 13:37:39,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2435 states. [2022-02-15 13:37:39,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2435 to 2251. [2022-02-15 13:37:39,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2251 states, 2250 states have (on average 3.2964444444444445) internal successors, (7417), 2250 states have internal predecessors, (7417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:39,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2251 states to 2251 states and 7417 transitions. [2022-02-15 13:37:39,478 INFO L78 Accepts]: Start accepts. Automaton has 2251 states and 7417 transitions. Word has length 24 [2022-02-15 13:37:39,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:39,479 INFO L470 AbstractCegarLoop]: Abstraction has 2251 states and 7417 transitions. [2022-02-15 13:37:39,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:39,479 INFO L276 IsEmpty]: Start isEmpty. Operand 2251 states and 7417 transitions. [2022-02-15 13:37:39,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:39,481 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:39,482 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:39,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:39,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2022-02-15 13:37:39,695 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:39,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:39,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1073139423, now seen corresponding path program 372 times [2022-02-15 13:37:39,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:39,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98420403] [2022-02-15 13:37:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:39,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:39,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:39,890 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:39,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98420403] [2022-02-15 13:37:39,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98420403] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:39,890 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663824420] [2022-02-15 13:37:39,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:37:39,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:39,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:39,891 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) [2022-02-15 13:37:39,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-02-15 13:37:39,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:37:39,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:39,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:37:39,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:39,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:39,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:37:40,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:40,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 22 [2022-02-15 13:37:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:40,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:40,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:40,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-02-15 13:37:40,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:40,671 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 78 treesize of output 72 [2022-02-15 13:37:40,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:40,676 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 64 treesize of output 58 [2022-02-15 13:37:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:40,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663824420] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:40,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:40,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:37:40,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393117503] [2022-02-15 13:37:40,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:40,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:37:40,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:40,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:37:40,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:37:40,713 INFO L87 Difference]: Start difference. First operand 2251 states and 7417 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:43,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:43,105 INFO L93 Difference]: Finished difference Result 3768 states and 11445 transitions. [2022-02-15 13:37:43,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 13:37:43,105 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:37:43,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:43,111 INFO L225 Difference]: With dead ends: 3768 [2022-02-15 13:37:43,111 INFO L226 Difference]: Without dead ends: 3451 [2022-02-15 13:37:43,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=455, Invalid=2095, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 13:37:43,111 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 217 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:43,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 639 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1474 Invalid, 0 Unknown, 308 Unchecked, 0.5s Time] [2022-02-15 13:37:43,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3451 states. [2022-02-15 13:37:43,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3451 to 2270. [2022-02-15 13:37:43,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 2269 states have (on average 3.3018951079770824) internal successors, (7492), 2269 states have internal predecessors, (7492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:43,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 7492 transitions. [2022-02-15 13:37:43,150 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 7492 transitions. Word has length 24 [2022-02-15 13:37:43,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:43,150 INFO L470 AbstractCegarLoop]: Abstraction has 2270 states and 7492 transitions. [2022-02-15 13:37:43,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:43,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 7492 transitions. [2022-02-15 13:37:43,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:43,153 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:43,153 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:43,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:43,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387,373 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:43,369 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:43,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:43,369 INFO L85 PathProgramCache]: Analyzing trace with hash -141845947, now seen corresponding path program 373 times [2022-02-15 13:37:43,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:43,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873546473] [2022-02-15 13:37:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:43,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:43,516 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:43,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873546473] [2022-02-15 13:37:43,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873546473] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:43,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352146359] [2022-02-15 13:37:43,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:37:43,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:43,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:43,517 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) [2022-02-15 13:37:43,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2022-02-15 13:37:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:43,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:43,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:43,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:43,611 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:37:43,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:43,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:37:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:43,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:44,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:44,312 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 87 treesize of output 81 [2022-02-15 13:37:44,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:44,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 109 [2022-02-15 13:37:44,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:44,428 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 101 treesize of output 85 [2022-02-15 13:37:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:44,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352146359] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:44,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:44,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:37:44,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981716] [2022-02-15 13:37:44,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:44,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:37:44,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:44,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:37:44,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:37:44,471 INFO L87 Difference]: Start difference. First operand 2270 states and 7492 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:44,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:44,623 INFO L93 Difference]: Finished difference Result 2430 states and 7943 transitions. [2022-02-15 13:37:44,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:37:44,623 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:37:44,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:44,628 INFO L225 Difference]: With dead ends: 2430 [2022-02-15 13:37:44,628 INFO L226 Difference]: Without dead ends: 2423 [2022-02-15 13:37:44,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:37:44,628 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:44,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 182 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 429 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2022-02-15 13:37:44,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2022-02-15 13:37:44,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2268. [2022-02-15 13:37:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2268 states, 2267 states have (on average 3.302161446846052) internal successors, (7486), 2267 states have internal predecessors, (7486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:44,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 7486 transitions. [2022-02-15 13:37:44,654 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 7486 transitions. Word has length 24 [2022-02-15 13:37:44,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:44,654 INFO L470 AbstractCegarLoop]: Abstraction has 2268 states and 7486 transitions. [2022-02-15 13:37:44,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:44,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 7486 transitions. [2022-02-15 13:37:44,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:44,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:44,657 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:44,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Ended with exit code 0 [2022-02-15 13:37:44,865 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,SelfDestructingSolverStorable388 [2022-02-15 13:37:44,865 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:44,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:44,865 INFO L85 PathProgramCache]: Analyzing trace with hash 939216679, now seen corresponding path program 374 times [2022-02-15 13:37:44,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:44,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434201555] [2022-02-15 13:37:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:44,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:37:45,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:45,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434201555] [2022-02-15 13:37:45,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434201555] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:45,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084983188] [2022-02-15 13:37:45,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:37:45,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:45,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:45,084 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) [2022-02-15 13:37:45,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2022-02-15 13:37:45,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:37:45,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:45,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:45,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:45,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:45,145 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:37:45,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:45,349 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:37:45,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:45,351 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:37:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:37:45,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:45,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:45,807 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 57 treesize of output 55 [2022-02-15 13:37:45,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:45,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 52 [2022-02-15 13:37:45,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:45,859 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 43 treesize of output 40 [2022-02-15 13:37:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:37:45,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084983188] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:45,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:45,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:37:45,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176902533] [2022-02-15 13:37:45,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:45,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:37:45,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:45,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:37:45,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:37:45,877 INFO L87 Difference]: Start difference. First operand 2268 states and 7486 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:46,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:46,215 INFO L93 Difference]: Finished difference Result 2369 states and 7796 transitions. [2022-02-15 13:37:46,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:37:46,215 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:37:46,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:46,235 INFO L225 Difference]: With dead ends: 2369 [2022-02-15 13:37:46,235 INFO L226 Difference]: Without dead ends: 2348 [2022-02-15 13:37:46,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:37:46,235 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:46,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 229 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 556 Invalid, 0 Unknown, 93 Unchecked, 0.2s Time] [2022-02-15 13:37:46,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2022-02-15 13:37:46,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2268. [2022-02-15 13:37:46,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2268 states, 2267 states have (on average 3.302161446846052) internal successors, (7486), 2267 states have internal predecessors, (7486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:46,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 7486 transitions. [2022-02-15 13:37:46,260 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 7486 transitions. Word has length 24 [2022-02-15 13:37:46,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:46,260 INFO L470 AbstractCegarLoop]: Abstraction has 2268 states and 7486 transitions. [2022-02-15 13:37:46,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:46,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 7486 transitions. [2022-02-15 13:37:46,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:46,263 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:46,263 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:46,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Ended with exit code 0 [2022-02-15 13:37:46,466 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,SelfDestructingSolverStorable389 [2022-02-15 13:37:46,466 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:46,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:46,467 INFO L85 PathProgramCache]: Analyzing trace with hash 302749825, now seen corresponding path program 375 times [2022-02-15 13:37:46,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:46,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964593728] [2022-02-15 13:37:46,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:46,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:37:46,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:46,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964593728] [2022-02-15 13:37:46,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964593728] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:46,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337266976] [2022-02-15 13:37:46,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:37:46,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:46,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:46,655 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) [2022-02-15 13:37:46,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Waiting until timeout for monitored process [2022-02-15 13:37:46,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:37:46,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:46,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:46,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:46,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:46,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:37:46,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:46,919 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:37:46,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:46,921 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:37:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:37:46,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:47,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:47,387 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 57 treesize of output 55 [2022-02-15 13:37:47,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:47,451 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 60 treesize of output 57 [2022-02-15 13:37:47,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:47,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 45 [2022-02-15 13:37:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:37:47,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337266976] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:47,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:47,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:37:47,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152714367] [2022-02-15 13:37:47,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:47,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:37:47,497 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:47,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:37:47,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:37:47,497 INFO L87 Difference]: Start difference. First operand 2268 states and 7486 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:48,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:48,042 INFO L93 Difference]: Finished difference Result 2593 states and 8450 transitions. [2022-02-15 13:37:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:37:48,043 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:37:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:48,047 INFO L225 Difference]: With dead ends: 2593 [2022-02-15 13:37:48,047 INFO L226 Difference]: Without dead ends: 2554 [2022-02-15 13:37:48,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:37:48,048 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 106 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:48,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 402 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 836 Invalid, 0 Unknown, 365 Unchecked, 0.3s Time] [2022-02-15 13:37:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2022-02-15 13:37:48,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 2265. [2022-02-15 13:37:48,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2264 states have (on average 3.302120141342756) internal successors, (7476), 2264 states have internal predecessors, (7476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 7476 transitions. [2022-02-15 13:37:48,077 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 7476 transitions. Word has length 24 [2022-02-15 13:37:48,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:48,077 INFO L470 AbstractCegarLoop]: Abstraction has 2265 states and 7476 transitions. [2022-02-15 13:37:48,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:48,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 7476 transitions. [2022-02-15 13:37:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:48,079 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:48,079 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:48,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:48,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,376 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:48,295 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:48,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:48,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1495067879, now seen corresponding path program 376 times [2022-02-15 13:37:48,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:48,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857161386] [2022-02-15 13:37:48,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:48,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:48,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:48,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857161386] [2022-02-15 13:37:48,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857161386] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:48,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468179896] [2022-02-15 13:37:48,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:37:48,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:48,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:48,434 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) [2022-02-15 13:37:48,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Waiting until timeout for monitored process [2022-02-15 13:37:48,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:37:48,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:48,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:37:48,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:48,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:37:48,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:37:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:48,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:49,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:49,001 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 53 treesize of output 51 [2022-02-15 13:37:49,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:49,052 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 81 treesize of output 73 [2022-02-15 13:37:49,055 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:49,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 57 [2022-02-15 13:37:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:49,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468179896] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:49,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:49,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:37:49,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502600061] [2022-02-15 13:37:49,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:49,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:37:49,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:49,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:37:49,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:37:49,104 INFO L87 Difference]: Start difference. First operand 2265 states and 7476 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:50,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:50,055 INFO L93 Difference]: Finished difference Result 3035 states and 9654 transitions. [2022-02-15 13:37:50,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 13:37:50,055 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:37:50,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:50,060 INFO L225 Difference]: With dead ends: 3035 [2022-02-15 13:37:50,060 INFO L226 Difference]: Without dead ends: 2887 [2022-02-15 13:37:50,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 13:37:50,060 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 138 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 1130 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:50,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 342 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1130 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:37:50,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2022-02-15 13:37:50,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2271. [2022-02-15 13:37:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 2270 states have (on average 3.3044052863436124) internal successors, (7501), 2270 states have internal predecessors, (7501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 7501 transitions. [2022-02-15 13:37:50,092 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 7501 transitions. Word has length 24 [2022-02-15 13:37:50,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:50,092 INFO L470 AbstractCegarLoop]: Abstraction has 2271 states and 7501 transitions. [2022-02-15 13:37:50,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:50,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 7501 transitions. [2022-02-15 13:37:50,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:50,095 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:50,095 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:50,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:50,311 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,SelfDestructingSolverStorable391 [2022-02-15 13:37:50,311 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:50,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:50,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1635966243, now seen corresponding path program 377 times [2022-02-15 13:37:50,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:50,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770414154] [2022-02-15 13:37:50,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:50,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:50,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:50,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770414154] [2022-02-15 13:37:50,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770414154] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:50,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671268213] [2022-02-15 13:37:50,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:37:50,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:50,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:50,447 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) [2022-02-15 13:37:50,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Waiting until timeout for monitored process [2022-02-15 13:37:50,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:37:50,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:50,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:50,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:50,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:37:50,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:50,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 53 treesize of output 45 [2022-02-15 13:37:50,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:50,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 31 [2022-02-15 13:37:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:50,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:51,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:51,178 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 87 treesize of output 81 [2022-02-15 13:37:51,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:51,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-02-15 13:37:51,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:51,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-02-15 13:37:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:51,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671268213] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:51,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:51,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:37:51,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907411081] [2022-02-15 13:37:51,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:51,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:37:51,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:51,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:37:51,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:37:51,312 INFO L87 Difference]: Start difference. First operand 2271 states and 7501 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:51,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:51,509 INFO L93 Difference]: Finished difference Result 2441 states and 7949 transitions. [2022-02-15 13:37:51,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:37:51,509 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:37:51,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:51,513 INFO L225 Difference]: With dead ends: 2441 [2022-02-15 13:37:51,513 INFO L226 Difference]: Without dead ends: 2383 [2022-02-15 13:37:51,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:37:51,514 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:51,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 256 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 480 Invalid, 0 Unknown, 221 Unchecked, 0.2s Time] [2022-02-15 13:37:51,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2022-02-15 13:37:51,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2271. [2022-02-15 13:37:51,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 2270 states have (on average 3.3044052863436124) internal successors, (7501), 2270 states have internal predecessors, (7501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:51,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 7501 transitions. [2022-02-15 13:37:51,540 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 7501 transitions. Word has length 24 [2022-02-15 13:37:51,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:51,540 INFO L470 AbstractCegarLoop]: Abstraction has 2271 states and 7501 transitions. [2022-02-15 13:37:51,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:51,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 7501 transitions. [2022-02-15 13:37:51,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:51,543 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:51,543 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:51,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:51,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,378 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:51,755 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:51,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:51,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1494558789, now seen corresponding path program 378 times [2022-02-15 13:37:51,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:51,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794234069] [2022-02-15 13:37:51,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:51,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:51,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:51,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794234069] [2022-02-15 13:37:51,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794234069] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:51,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669787484] [2022-02-15 13:37:51,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:37:51,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:51,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:51,920 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) [2022-02-15 13:37:51,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Waiting until timeout for monitored process [2022-02-15 13:37:51,947 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:37:51,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:51,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:51,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:51,974 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 41 treesize of output 35 [2022-02-15 13:37:52,064 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 47 treesize of output 41 [2022-02-15 13:37:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:52,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:52,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:52,611 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 55 treesize of output 53 [2022-02-15 13:37:52,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:52,696 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 58 treesize of output 55 [2022-02-15 13:37:52,700 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:52,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2022-02-15 13:37:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:52,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669787484] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:52,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:52,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:37:52,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14778558] [2022-02-15 13:37:52,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:52,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:37:52,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:52,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:37:52,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:37:52,757 INFO L87 Difference]: Start difference. First operand 2271 states and 7501 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:55,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:55,171 INFO L93 Difference]: Finished difference Result 2998 states and 9424 transitions. [2022-02-15 13:37:55,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 13:37:55,171 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:37:55,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:55,177 INFO L225 Difference]: With dead ends: 2998 [2022-02-15 13:37:55,177 INFO L226 Difference]: Without dead ends: 2803 [2022-02-15 13:37:55,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=374, Invalid=1978, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 13:37:55,178 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 188 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:55,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 442 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1432 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:37:55,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2803 states. [2022-02-15 13:37:55,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2803 to 2276. [2022-02-15 13:37:55,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 3.3085714285714287) internal successors, (7527), 2275 states have internal predecessors, (7527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:55,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 7527 transitions. [2022-02-15 13:37:55,210 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 7527 transitions. Word has length 24 [2022-02-15 13:37:55,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:55,210 INFO L470 AbstractCegarLoop]: Abstraction has 2276 states and 7527 transitions. [2022-02-15 13:37:55,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:55,210 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 7527 transitions. [2022-02-15 13:37:55,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:55,213 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:55,213 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:55,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Forceful destruction successful, exit code 0 [2022-02-15 13:37:55,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,379 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:55,427 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:55,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:55,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1844248733, now seen corresponding path program 379 times [2022-02-15 13:37:55,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:55,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533062840] [2022-02-15 13:37:55,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:55,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:55,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:55,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533062840] [2022-02-15 13:37:55,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533062840] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:55,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788386588] [2022-02-15 13:37:55,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:37:55,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:55,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:55,659 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) [2022-02-15 13:37:55,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Waiting until timeout for monitored process [2022-02-15 13:37:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:55,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:37:55,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:55,737 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 41 treesize of output 35 [2022-02-15 13:37:55,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:55,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 41 [2022-02-15 13:37:55,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:55,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:37:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:56,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:37:56,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:56,735 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 48 treesize of output 48 [2022-02-15 13:37:56,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:56,817 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 78 treesize of output 72 [2022-02-15 13:37:56,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:37:56,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2022-02-15 13:37:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:56,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788386588] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:37:56,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:37:56,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:37:56,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089041757] [2022-02-15 13:37:56,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:37:56,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:37:56,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:37:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:37:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:37:56,861 INFO L87 Difference]: Start difference. First operand 2276 states and 7527 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:37:59,295 INFO L93 Difference]: Finished difference Result 3521 states and 10846 transitions. [2022-02-15 13:37:59,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 13:37:59,295 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:37:59,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:37:59,301 INFO L225 Difference]: With dead ends: 3521 [2022-02-15 13:37:59,301 INFO L226 Difference]: Without dead ends: 3328 [2022-02-15 13:37:59,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 13:37:59,301 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 214 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1406 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:37:59,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 599 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1406 Invalid, 0 Unknown, 286 Unchecked, 0.6s Time] [2022-02-15 13:37:59,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2022-02-15 13:37:59,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2278. [2022-02-15 13:37:59,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 3.3078612209046994) internal successors, (7532), 2277 states have internal predecessors, (7532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:37:59,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 7532 transitions. [2022-02-15 13:37:59,336 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 7532 transitions. Word has length 24 [2022-02-15 13:37:59,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:37:59,336 INFO L470 AbstractCegarLoop]: Abstraction has 2278 states and 7532 transitions. [2022-02-15 13:37:59,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:37:59,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 7532 transitions. [2022-02-15 13:37:59,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:37:59,339 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:37:59,339 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:37:59,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Ended with exit code 0 [2022-02-15 13:37:59,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,380 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:59,551 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:37:59,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:37:59,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1261110975, now seen corresponding path program 380 times [2022-02-15 13:37:59,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:37:59,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083875837] [2022-02-15 13:37:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:37:59,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:37:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:37:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:37:59,747 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:37:59,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083875837] [2022-02-15 13:37:59,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083875837] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:37:59,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785544023] [2022-02-15 13:37:59,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:37:59,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:37:59,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:37:59,748 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) [2022-02-15 13:37:59,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Waiting until timeout for monitored process [2022-02-15 13:37:59,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:37:59,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:37:59,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:37:59,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:37:59,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:37:59,852 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:00,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:00,201 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:38:00,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:00,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:38:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:00,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:00,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:00,584 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 80 treesize of output 76 [2022-02-15 13:38:00,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:00,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-02-15 13:38:00,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:00,696 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 46 treesize of output 43 [2022-02-15 13:38:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:00,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785544023] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:00,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:00,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:38:00,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577348317] [2022-02-15 13:38:00,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:00,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:38:00,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:00,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:38:00,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:38:00,738 INFO L87 Difference]: Start difference. First operand 2278 states and 7532 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) [2022-02-15 13:38:01,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:01,050 INFO L93 Difference]: Finished difference Result 2404 states and 7879 transitions. [2022-02-15 13:38:01,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:38:01,050 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 24 [2022-02-15 13:38:01,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:01,054 INFO L225 Difference]: With dead ends: 2404 [2022-02-15 13:38:01,054 INFO L226 Difference]: Without dead ends: 2345 [2022-02-15 13:38:01,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:38:01,054 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:01,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 236 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 470 Invalid, 0 Unknown, 155 Unchecked, 0.1s Time] [2022-02-15 13:38:01,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2022-02-15 13:38:01,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 2279. [2022-02-15 13:38:01,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2279 states, 2278 states have (on average 3.3081650570676033) internal successors, (7536), 2278 states have internal predecessors, (7536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:01,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 7536 transitions. [2022-02-15 13:38:01,080 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 7536 transitions. Word has length 24 [2022-02-15 13:38:01,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:01,080 INFO L470 AbstractCegarLoop]: Abstraction has 2279 states and 7536 transitions. [2022-02-15 13:38:01,080 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) [2022-02-15 13:38:01,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 7536 transitions. [2022-02-15 13:38:01,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:01,083 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:01,083 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:01,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:01,288 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,SelfDestructingSolverStorable395 [2022-02-15 13:38:01,288 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:01,288 INFO L85 PathProgramCache]: Analyzing trace with hash -97177801, now seen corresponding path program 381 times [2022-02-15 13:38:01,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:01,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617287585] [2022-02-15 13:38:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:01,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:01,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:01,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617287585] [2022-02-15 13:38:01,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617287585] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:01,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994209384] [2022-02-15 13:38:01,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:38:01,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:01,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:01,500 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) [2022-02-15 13:38:01,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Waiting until timeout for monitored process [2022-02-15 13:38:01,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:38:01,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:01,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:38:01,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:01,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:01,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:38:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:01,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:02,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:02,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-02-15 13:38:02,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:02,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 78 [2022-02-15 13:38:02,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:02,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-02-15 13:38:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:02,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994209384] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:02,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:02,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:02,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949820988] [2022-02-15 13:38:02,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:02,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:02,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:02,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:02,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:02,456 INFO L87 Difference]: Start difference. First operand 2279 states and 7536 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:03,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:03,456 INFO L93 Difference]: Finished difference Result 2936 states and 9290 transitions. [2022-02-15 13:38:03,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:38:03,456 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:38:03,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:03,461 INFO L225 Difference]: With dead ends: 2936 [2022-02-15 13:38:03,461 INFO L226 Difference]: Without dead ends: 2798 [2022-02-15 13:38:03,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:38:03,462 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 146 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:03,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 459 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:38:03,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2022-02-15 13:38:03,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2284. [2022-02-15 13:38:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 3.3101182654402104) internal successors, (7557), 2283 states have internal predecessors, (7557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:03,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 7557 transitions. [2022-02-15 13:38:03,494 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 7557 transitions. Word has length 24 [2022-02-15 13:38:03,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:03,494 INFO L470 AbstractCegarLoop]: Abstraction has 2284 states and 7557 transitions. [2022-02-15 13:38:03,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 7557 transitions. [2022-02-15 13:38:03,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:03,497 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:03,497 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:03,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:03,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,382 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:03,705 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:03,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:03,706 INFO L85 PathProgramCache]: Analyzing trace with hash -952560131, now seen corresponding path program 382 times [2022-02-15 13:38:03,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:03,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491107391] [2022-02-15 13:38:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:03,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:03,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:03,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491107391] [2022-02-15 13:38:03,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491107391] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:03,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059954328] [2022-02-15 13:38:03,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:38:03,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:03,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:03,900 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) [2022-02-15 13:38:03,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Waiting until timeout for monitored process [2022-02-15 13:38:03,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:38:03,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:03,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:38:03,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:04,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:04,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:38:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:04,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:04,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:04,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-02-15 13:38:04,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:04,931 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 86 treesize of output 78 [2022-02-15 13:38:04,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:04,937 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 70 treesize of output 62 [2022-02-15 13:38:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:04,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059954328] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:04,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:04,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:38:04,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372075986] [2022-02-15 13:38:04,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:04,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:38:04,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:04,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:38:04,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:38:04,985 INFO L87 Difference]: Start difference. First operand 2284 states and 7557 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-02-15 13:38:05,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:05,646 INFO L93 Difference]: Finished difference Result 2596 states and 8418 transitions. [2022-02-15 13:38:05,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:38:05,647 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 24 [2022-02-15 13:38:05,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:05,651 INFO L225 Difference]: With dead ends: 2596 [2022-02-15 13:38:05,651 INFO L226 Difference]: Without dead ends: 2494 [2022-02-15 13:38:05,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:38:05,651 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 83 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:05,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 260 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:38:05,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2494 states. [2022-02-15 13:38:05,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2494 to 2287. [2022-02-15 13:38:05,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2287 states, 2286 states have (on average 3.3075240594925632) internal successors, (7561), 2286 states have internal predecessors, (7561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:05,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2287 states to 2287 states and 7561 transitions. [2022-02-15 13:38:05,679 INFO L78 Accepts]: Start accepts. Automaton has 2287 states and 7561 transitions. Word has length 24 [2022-02-15 13:38:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:05,679 INFO L470 AbstractCegarLoop]: Abstraction has 2287 states and 7561 transitions. [2022-02-15 13:38:05,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-02-15 13:38:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2287 states and 7561 transitions. [2022-02-15 13:38:05,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:05,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:05,682 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:05,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:05,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,383 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:05,891 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:05,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1171791359, now seen corresponding path program 383 times [2022-02-15 13:38:05,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:05,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548066585] [2022-02-15 13:38:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:05,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:06,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:06,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548066585] [2022-02-15 13:38:06,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548066585] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:06,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900582484] [2022-02-15 13:38:06,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:38:06,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:06,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:06,081 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) [2022-02-15 13:38:06,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Waiting until timeout for monitored process [2022-02-15 13:38:06,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:38:06,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:06,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:38:06,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:06,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:06,415 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 26 treesize of output 22 [2022-02-15 13:38:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:06,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:07,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:07,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-02-15 13:38:07,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:07,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-02-15 13:38:07,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:07,266 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 99 treesize of output 83 [2022-02-15 13:38:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:07,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900582484] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:07,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:07,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:07,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222468309] [2022-02-15 13:38:07,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:07,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:07,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:07,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:07,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:07,302 INFO L87 Difference]: Start difference. First operand 2287 states and 7561 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:07,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:07,659 INFO L93 Difference]: Finished difference Result 2507 states and 8136 transitions. [2022-02-15 13:38:07,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:38:07,659 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:38:07,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:07,663 INFO L225 Difference]: With dead ends: 2507 [2022-02-15 13:38:07,664 INFO L226 Difference]: Without dead ends: 2430 [2022-02-15 13:38:07,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:38:07,664 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 93 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:07,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 245 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:38:07,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2022-02-15 13:38:07,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 2280. [2022-02-15 13:38:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 3.30846862659061) internal successors, (7540), 2279 states have internal predecessors, (7540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 7540 transitions. [2022-02-15 13:38:07,693 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 7540 transitions. Word has length 24 [2022-02-15 13:38:07,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:07,693 INFO L470 AbstractCegarLoop]: Abstraction has 2280 states and 7540 transitions. [2022-02-15 13:38:07,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:07,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 7540 transitions. [2022-02-15 13:38:07,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:07,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:07,695 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:07,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:07,911 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,SelfDestructingSolverStorable398 [2022-02-15 13:38:07,911 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:07,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:07,911 INFO L85 PathProgramCache]: Analyzing trace with hash 186495283, now seen corresponding path program 384 times [2022-02-15 13:38:07,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:07,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452520546] [2022-02-15 13:38:07,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:07,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:08,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:08,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:08,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452520546] [2022-02-15 13:38:08,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452520546] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:08,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899819475] [2022-02-15 13:38:08,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:38:08,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:08,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:08,077 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) [2022-02-15 13:38:08,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Waiting until timeout for monitored process [2022-02-15 13:38:08,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:38:08,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:08,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:38:08,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:08,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:08,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:08,201 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:38:08,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:08,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:38:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:08,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:08,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:08,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 67 [2022-02-15 13:38:08,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:08,878 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 46 treesize of output 45 [2022-02-15 13:38:08,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:08,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2022-02-15 13:38:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:08,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899819475] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:08,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:08,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:08,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576989101] [2022-02-15 13:38:08,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:08,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:08,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:08,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:08,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:08,913 INFO L87 Difference]: Start difference. First operand 2280 states and 7540 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:09,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:09,456 INFO L93 Difference]: Finished difference Result 2584 states and 8307 transitions. [2022-02-15 13:38:09,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:38:09,456 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:38:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:09,460 INFO L225 Difference]: With dead ends: 2584 [2022-02-15 13:38:09,460 INFO L226 Difference]: Without dead ends: 2491 [2022-02-15 13:38:09,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:38:09,460 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 147 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:09,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 258 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 843 Invalid, 0 Unknown, 62 Unchecked, 0.3s Time] [2022-02-15 13:38:09,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2022-02-15 13:38:09,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 2283. [2022-02-15 13:38:09,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2282 states have (on average 3.308501314636284) internal successors, (7550), 2282 states have internal predecessors, (7550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:09,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 7550 transitions. [2022-02-15 13:38:09,487 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 7550 transitions. Word has length 24 [2022-02-15 13:38:09,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:09,487 INFO L470 AbstractCegarLoop]: Abstraction has 2283 states and 7550 transitions. [2022-02-15 13:38:09,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:09,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 7550 transitions. [2022-02-15 13:38:09,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:09,490 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:09,490 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:09,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:09,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2022-02-15 13:38:09,706 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:09,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:09,706 INFO L85 PathProgramCache]: Analyzing trace with hash -386429481, now seen corresponding path program 385 times [2022-02-15 13:38:09,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:09,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065322716] [2022-02-15 13:38:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:09,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:09,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:09,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065322716] [2022-02-15 13:38:09,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065322716] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:09,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518946575] [2022-02-15 13:38:09,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:38:09,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:09,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:09,963 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) [2022-02-15 13:38:09,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Waiting until timeout for monitored process [2022-02-15 13:38:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:09,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:38:09,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:10,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:10,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:10,167 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:38:10,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:10,170 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:38:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:10,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:10,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:10,919 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 69 treesize of output 67 [2022-02-15 13:38:11,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:11,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 68 [2022-02-15 13:38:11,061 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:11,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 54 [2022-02-15 13:38:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:11,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518946575] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:11,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:11,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:11,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489542965] [2022-02-15 13:38:11,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:11,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:11,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:11,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:11,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:11,109 INFO L87 Difference]: Start difference. First operand 2283 states and 7550 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:13,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:13,724 INFO L93 Difference]: Finished difference Result 3384 states and 10372 transitions. [2022-02-15 13:38:13,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 13:38:13,724 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:38:13,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:13,731 INFO L225 Difference]: With dead ends: 3384 [2022-02-15 13:38:13,731 INFO L226 Difference]: Without dead ends: 3177 [2022-02-15 13:38:13,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=360, Invalid=1710, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 13:38:13,731 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 306 mSDsluCounter, 1008 mSDsCounter, 0 mSdLazyCounter, 1401 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:13,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 613 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1401 Invalid, 0 Unknown, 27 Unchecked, 0.7s Time] [2022-02-15 13:38:13,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3177 states. [2022-02-15 13:38:13,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3177 to 2294. [2022-02-15 13:38:13,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 3.316179677278674) internal successors, (7604), 2293 states have internal predecessors, (7604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:13,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 7604 transitions. [2022-02-15 13:38:13,769 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 7604 transitions. Word has length 24 [2022-02-15 13:38:13,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:13,769 INFO L470 AbstractCegarLoop]: Abstraction has 2294 states and 7604 transitions. [2022-02-15 13:38:13,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:13,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 7604 transitions. [2022-02-15 13:38:13,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:13,772 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:13,772 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:13,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Ended with exit code 0 [2022-02-15 13:38:13,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2022-02-15 13:38:13,988 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:13,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:13,988 INFO L85 PathProgramCache]: Analyzing trace with hash 915780061, now seen corresponding path program 386 times [2022-02-15 13:38:13,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:13,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540341106] [2022-02-15 13:38:13,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:13,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:14,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:14,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540341106] [2022-02-15 13:38:14,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540341106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:14,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963312853] [2022-02-15 13:38:14,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:38:14,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:14,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:14,189 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) [2022-02-15 13:38:14,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Waiting until timeout for monitored process [2022-02-15 13:38:14,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:38:14,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:14,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:38:14,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:14,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:14,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:38:14,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:14,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 36 [2022-02-15 13:38:14,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:14,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:38:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:14,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:15,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:15,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 121 [2022-02-15 13:38:15,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:15,280 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 56 treesize of output 53 [2022-02-15 13:38:15,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:15,283 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 44 treesize of output 41 [2022-02-15 13:38:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:15,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963312853] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:15,313 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:15,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:38:15,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764609411] [2022-02-15 13:38:15,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:15,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:38:15,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:15,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:38:15,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:38:15,314 INFO L87 Difference]: Start difference. First operand 2294 states and 7604 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) [2022-02-15 13:38:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:16,131 INFO L93 Difference]: Finished difference Result 2575 states and 8297 transitions. [2022-02-15 13:38:16,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:38:16,131 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 24 [2022-02-15 13:38:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:16,141 INFO L225 Difference]: With dead ends: 2575 [2022-02-15 13:38:16,141 INFO L226 Difference]: Without dead ends: 2456 [2022-02-15 13:38:16,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:38:16,141 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 172 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:16,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 249 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 863 Invalid, 0 Unknown, 93 Unchecked, 0.3s Time] [2022-02-15 13:38:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2022-02-15 13:38:16,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2295. [2022-02-15 13:38:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2294 states have (on average 3.3169136878814296) internal successors, (7609), 2294 states have internal predecessors, (7609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 7609 transitions. [2022-02-15 13:38:16,177 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 7609 transitions. Word has length 24 [2022-02-15 13:38:16,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:16,178 INFO L470 AbstractCegarLoop]: Abstraction has 2295 states and 7609 transitions. [2022-02-15 13:38:16,178 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) [2022-02-15 13:38:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 7609 transitions. [2022-02-15 13:38:16,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:16,181 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:16,181 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:16,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:16,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,387 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:16,397 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:16,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:16,397 INFO L85 PathProgramCache]: Analyzing trace with hash -954957603, now seen corresponding path program 387 times [2022-02-15 13:38:16,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:16,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281864079] [2022-02-15 13:38:16,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:16,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:16,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:38:16,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:16,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281864079] [2022-02-15 13:38:16,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281864079] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:16,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998383481] [2022-02-15 13:38:16,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:38:16,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:16,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:16,518 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) [2022-02-15 13:38:16,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Waiting until timeout for monitored process [2022-02-15 13:38:16,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:38:16,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:16,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:38:16,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:16,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:16,671 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:38:16,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:16,721 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 13:38:16,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:16,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:38:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:38:16,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:17,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:17,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 95 [2022-02-15 13:38:17,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:17,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-02-15 13:38:17,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:17,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-02-15 13:38:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:38:17,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998383481] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:17,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:17,819 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:38:17,819 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52852294] [2022-02-15 13:38:17,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:17,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:38:17,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:17,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:38:17,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:38:17,819 INFO L87 Difference]: Start difference. First operand 2295 states and 7609 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) [2022-02-15 13:38:18,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:18,474 INFO L93 Difference]: Finished difference Result 2649 states and 8563 transitions. [2022-02-15 13:38:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:38:18,474 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 24 [2022-02-15 13:38:18,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:18,480 INFO L225 Difference]: With dead ends: 2649 [2022-02-15 13:38:18,480 INFO L226 Difference]: Without dead ends: 2553 [2022-02-15 13:38:18,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:38:18,480 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 140 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:18,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 248 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 794 Invalid, 0 Unknown, 197 Unchecked, 0.4s Time] [2022-02-15 13:38:18,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2553 states. [2022-02-15 13:38:18,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2553 to 2296. [2022-02-15 13:38:18,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 3.3176470588235296) internal successors, (7614), 2295 states have internal predecessors, (7614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 7614 transitions. [2022-02-15 13:38:18,511 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 7614 transitions. Word has length 24 [2022-02-15 13:38:18,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:18,511 INFO L470 AbstractCegarLoop]: Abstraction has 2296 states and 7614 transitions. [2022-02-15 13:38:18,511 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) [2022-02-15 13:38:18,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 7614 transitions. [2022-02-15 13:38:18,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:18,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:18,514 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:18,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:18,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,388 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:18,730 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:18,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:18,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2079355009, now seen corresponding path program 388 times [2022-02-15 13:38:18,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:18,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7079555] [2022-02-15 13:38:18,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:18,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:18,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:18,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7079555] [2022-02-15 13:38:18,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7079555] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:18,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363268461] [2022-02-15 13:38:18,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:38:18,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:18,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:18,888 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) [2022-02-15 13:38:18,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Waiting until timeout for monitored process [2022-02-15 13:38:18,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:38:18,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:18,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:38:18,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:18,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:18,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:38:19,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:19,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:19,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:19,091 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:38:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:19,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:19,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:19,613 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 103 treesize of output 97 [2022-02-15 13:38:19,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:19,891 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 125 treesize of output 109 [2022-02-15 13:38:19,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:19,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 85 [2022-02-15 13:38:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:19,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363268461] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:19,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:19,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:19,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332468502] [2022-02-15 13:38:19,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:19,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:19,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:19,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:19,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:19,947 INFO L87 Difference]: Start difference. First operand 2296 states and 7614 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:20,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:20,369 INFO L93 Difference]: Finished difference Result 2478 states and 8044 transitions. [2022-02-15 13:38:20,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:38:20,370 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:38:20,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:20,374 INFO L225 Difference]: With dead ends: 2478 [2022-02-15 13:38:20,374 INFO L226 Difference]: Without dead ends: 2404 [2022-02-15 13:38:20,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:38:20,374 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 79 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:20,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 263 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 432 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2022-02-15 13:38:20,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-02-15 13:38:20,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 2296. [2022-02-15 13:38:20,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 3.3176470588235296) internal successors, (7614), 2295 states have internal predecessors, (7614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 7614 transitions. [2022-02-15 13:38:20,402 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 7614 transitions. Word has length 24 [2022-02-15 13:38:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:20,402 INFO L470 AbstractCegarLoop]: Abstraction has 2296 states and 7614 transitions. [2022-02-15 13:38:20,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:20,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 7614 transitions. [2022-02-15 13:38:20,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:20,405 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:20,405 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:20,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:20,620 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,SelfDestructingSolverStorable403 [2022-02-15 13:38:20,620 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:20,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:20,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1998863999, now seen corresponding path program 389 times [2022-02-15 13:38:20,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:20,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494110285] [2022-02-15 13:38:20,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:20,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:38:20,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:20,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494110285] [2022-02-15 13:38:20,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494110285] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:20,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170224219] [2022-02-15 13:38:20,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:38:20,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:20,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:20,939 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) [2022-02-15 13:38:20,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Waiting until timeout for monitored process [2022-02-15 13:38:20,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:38:20,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:20,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:38:20,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:21,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:21,064 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:38:21,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:21,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 [2022-02-15 13:38:21,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:21,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-02-15 13:38:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:38:21,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:21,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:21,893 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 129 treesize of output 119 [2022-02-15 13:38:22,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:22,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2022-02-15 13:38:22,103 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:22,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-02-15 13:38:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:38:22,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170224219] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:22,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:22,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:22,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721674669] [2022-02-15 13:38:22,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:22,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:22,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:22,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:22,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:22,197 INFO L87 Difference]: Start difference. First operand 2296 states and 7614 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:22,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:22,622 INFO L93 Difference]: Finished difference Result 2390 states and 7856 transitions. [2022-02-15 13:38:22,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:38:22,622 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:38:22,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:22,627 INFO L225 Difference]: With dead ends: 2390 [2022-02-15 13:38:22,627 INFO L226 Difference]: Without dead ends: 2371 [2022-02-15 13:38:22,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:38:22,627 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 59 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:22,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 238 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 629 Invalid, 0 Unknown, 191 Unchecked, 0.3s Time] [2022-02-15 13:38:22,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2022-02-15 13:38:22,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 2294. [2022-02-15 13:38:22,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 2293 states have (on average 3.318360226777148) internal successors, (7609), 2293 states have internal predecessors, (7609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:22,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 7609 transitions. [2022-02-15 13:38:22,654 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 7609 transitions. Word has length 24 [2022-02-15 13:38:22,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:22,654 INFO L470 AbstractCegarLoop]: Abstraction has 2294 states and 7609 transitions. [2022-02-15 13:38:22,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:22,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 7609 transitions. [2022-02-15 13:38:22,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:22,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:22,658 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:22,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:22,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2022-02-15 13:38:22,875 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:22,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:22,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1711508523, now seen corresponding path program 390 times [2022-02-15 13:38:22,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:22,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846883629] [2022-02-15 13:38:22,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:22,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:23,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:23,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846883629] [2022-02-15 13:38:23,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846883629] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:23,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987703769] [2022-02-15 13:38:23,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:38:23,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:23,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:23,010 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) [2022-02-15 13:38:23,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Waiting until timeout for monitored process [2022-02-15 13:38:23,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:38:23,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:23,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:38:23,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:23,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:23,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:38:23,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:23,329 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:38:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:23,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:23,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:23,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-15 13:38:23,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:23,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:38:23,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:23,806 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 29 treesize of output 31 [2022-02-15 13:38:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:23,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987703769] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:23,829 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:23,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:23,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256331961] [2022-02-15 13:38:23,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:23,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:23,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:23,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:23,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:23,830 INFO L87 Difference]: Start difference. First operand 2294 states and 7609 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:24,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:24,466 INFO L93 Difference]: Finished difference Result 2796 states and 9000 transitions. [2022-02-15 13:38:24,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:38:24,466 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:38:24,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:24,471 INFO L225 Difference]: With dead ends: 2796 [2022-02-15 13:38:24,471 INFO L226 Difference]: Without dead ends: 2696 [2022-02-15 13:38:24,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:38:24,472 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 164 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:24,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 397 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 953 Invalid, 0 Unknown, 261 Unchecked, 0.4s Time] [2022-02-15 13:38:24,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2022-02-15 13:38:24,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2309. [2022-02-15 13:38:24,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 3.316724436741768) internal successors, (7655), 2308 states have internal predecessors, (7655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:24,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 7655 transitions. [2022-02-15 13:38:24,501 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 7655 transitions. Word has length 24 [2022-02-15 13:38:24,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:24,502 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 7655 transitions. [2022-02-15 13:38:24,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:24,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 7655 transitions. [2022-02-15 13:38:24,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:24,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:24,504 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:24,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:24,720 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,SelfDestructingSolverStorable405 [2022-02-15 13:38:24,720 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:24,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:24,720 INFO L85 PathProgramCache]: Analyzing trace with hash -390751695, now seen corresponding path program 391 times [2022-02-15 13:38:24,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:24,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971964180] [2022-02-15 13:38:24,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:24,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:24,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:24,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:24,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971964180] [2022-02-15 13:38:24,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971964180] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:24,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367716378] [2022-02-15 13:38:24,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:38:24,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:24,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:24,886 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) [2022-02-15 13:38:24,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Waiting until timeout for monitored process [2022-02-15 13:38:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:24,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:38:24,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:24,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:24,967 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:25,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:25,306 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-15 13:38:25,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-02-15 13:38:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:25,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:25,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:25,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-15 13:38:25,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:25,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:38:25,968 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:25,968 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 29 treesize of output 31 [2022-02-15 13:38:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:25,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367716378] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:25,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:25,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:25,989 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483823970] [2022-02-15 13:38:25,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:25,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:25,989 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:25,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:25,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:25,990 INFO L87 Difference]: Start difference. First operand 2309 states and 7655 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:26,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:26,519 INFO L93 Difference]: Finished difference Result 2704 states and 8734 transitions. [2022-02-15 13:38:26,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:38:26,519 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:38:26,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:26,524 INFO L225 Difference]: With dead ends: 2704 [2022-02-15 13:38:26,524 INFO L226 Difference]: Without dead ends: 2618 [2022-02-15 13:38:26,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:38:26,524 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 135 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:26,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 315 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 840 Invalid, 0 Unknown, 141 Unchecked, 0.3s Time] [2022-02-15 13:38:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2022-02-15 13:38:26,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 2309. [2022-02-15 13:38:26,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 3.316724436741768) internal successors, (7655), 2308 states have internal predecessors, (7655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:26,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 7655 transitions. [2022-02-15 13:38:26,553 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 7655 transitions. Word has length 24 [2022-02-15 13:38:26,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:26,553 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 7655 transitions. [2022-02-15 13:38:26,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:26,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 7655 transitions. [2022-02-15 13:38:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:26,555 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:26,555 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:26,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:26,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,392 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:26,771 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:26,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:26,771 INFO L85 PathProgramCache]: Analyzing trace with hash 773181479, now seen corresponding path program 392 times [2022-02-15 13:38:26,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:26,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304831238] [2022-02-15 13:38:26,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:26,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:26,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:26,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304831238] [2022-02-15 13:38:26,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304831238] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:26,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418070066] [2022-02-15 13:38:26,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:38:26,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:26,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:26,890 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) [2022-02-15 13:38:26,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Waiting until timeout for monitored process [2022-02-15 13:38:26,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:38:26,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:26,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:38:26,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:26,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:26,967 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:27,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:27,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2022-02-15 13:38:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:27,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:27,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:27,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-02-15 13:38:27,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:27,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:38:27,954 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:27,954 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 25 treesize of output 27 [2022-02-15 13:38:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:27,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418070066] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:27,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:27,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:27,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667478406] [2022-02-15 13:38:27,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:27,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:27,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:27,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:27,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:27,976 INFO L87 Difference]: Start difference. First operand 2309 states and 7655 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:30,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:30,868 INFO L93 Difference]: Finished difference Result 3368 states and 10370 transitions. [2022-02-15 13:38:30,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 13:38:30,868 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:38:30,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:30,874 INFO L225 Difference]: With dead ends: 3368 [2022-02-15 13:38:30,874 INFO L226 Difference]: Without dead ends: 3114 [2022-02-15 13:38:30,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 38 SyntacticMatches, 16 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=439, Invalid=2867, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 13:38:30,874 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 274 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 2221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:30,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 841 Invalid, 2221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1915 Invalid, 0 Unknown, 245 Unchecked, 0.8s Time] [2022-02-15 13:38:30,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3114 states. [2022-02-15 13:38:30,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3114 to 2328. [2022-02-15 13:38:30,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 3.322733132788999) internal successors, (7732), 2327 states have internal predecessors, (7732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:30,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 7732 transitions. [2022-02-15 13:38:30,908 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 7732 transitions. Word has length 24 [2022-02-15 13:38:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:30,908 INFO L470 AbstractCegarLoop]: Abstraction has 2328 states and 7732 transitions. [2022-02-15 13:38:30,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 7732 transitions. [2022-02-15 13:38:30,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:30,911 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:30,911 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:30,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:31,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 393 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2022-02-15 13:38:31,114 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:31,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:31,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1608317201, now seen corresponding path program 393 times [2022-02-15 13:38:31,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:31,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038226688] [2022-02-15 13:38:31,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:31,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:31,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:31,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038226688] [2022-02-15 13:38:31,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038226688] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:31,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416937750] [2022-02-15 13:38:31,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:38:31,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:31,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:31,288 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) [2022-02-15 13:38:31,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Waiting until timeout for monitored process [2022-02-15 13:38:31,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:38:31,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:31,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:38:31,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:31,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:31,367 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:31,579 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 30 treesize of output 24 [2022-02-15 13:38:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:31,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:32,120 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:32,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-15 13:38:32,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:32,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:38:32,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:32,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:38:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:32,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416937750] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:32,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:32,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:38:32,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486221379] [2022-02-15 13:38:32,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:32,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:38:32,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:32,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:38:32,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:38:32,255 INFO L87 Difference]: Start difference. First operand 2328 states and 7732 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-02-15 13:38:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:32,658 INFO L93 Difference]: Finished difference Result 2707 states and 8876 transitions. [2022-02-15 13:38:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:38:32,658 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 24 [2022-02-15 13:38:32,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:32,663 INFO L225 Difference]: With dead ends: 2707 [2022-02-15 13:38:32,663 INFO L226 Difference]: Without dead ends: 2604 [2022-02-15 13:38:32,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:38:32,663 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 120 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:32,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 288 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 874 Invalid, 0 Unknown, 282 Unchecked, 0.3s Time] [2022-02-15 13:38:32,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2604 states. [2022-02-15 13:38:32,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2604 to 2320. [2022-02-15 13:38:32,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2320 states, 2319 states have (on average 3.322984044846917) internal successors, (7706), 2319 states have internal predecessors, (7706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:32,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2320 states to 2320 states and 7706 transitions. [2022-02-15 13:38:32,712 INFO L78 Accepts]: Start accepts. Automaton has 2320 states and 7706 transitions. Word has length 24 [2022-02-15 13:38:32,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:32,713 INFO L470 AbstractCegarLoop]: Abstraction has 2320 states and 7706 transitions. [2022-02-15 13:38:32,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-02-15 13:38:32,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2320 states and 7706 transitions. [2022-02-15 13:38:32,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:32,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:32,716 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:32,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Ended with exit code 0 [2022-02-15 13:38:32,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,394 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:32,931 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:32,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:32,932 INFO L85 PathProgramCache]: Analyzing trace with hash -230870293, now seen corresponding path program 394 times [2022-02-15 13:38:32,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:32,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183216993] [2022-02-15 13:38:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:32,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:33,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:33,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183216993] [2022-02-15 13:38:33,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183216993] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:33,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210450418] [2022-02-15 13:38:33,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:38:33,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:33,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:33,128 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) [2022-02-15 13:38:33,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Waiting until timeout for monitored process [2022-02-15 13:38:33,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:38:33,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:33,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:38:33,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:33,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:33,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:33,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:33,497 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:38:33,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-15 13:38:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:33,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:34,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:34,071 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 78 treesize of output 70 [2022-02-15 13:38:34,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:34,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:38:34,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:34,178 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 29 treesize of output 31 [2022-02-15 13:38:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:34,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210450418] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:34,199 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:34,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:34,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685809183] [2022-02-15 13:38:34,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:34,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:34,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:34,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:34,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:34,200 INFO L87 Difference]: Start difference. First operand 2320 states and 7706 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:34,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:34,536 INFO L93 Difference]: Finished difference Result 2625 states and 8648 transitions. [2022-02-15 13:38:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:38:34,537 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:38:34,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:34,541 INFO L225 Difference]: With dead ends: 2625 [2022-02-15 13:38:34,541 INFO L226 Difference]: Without dead ends: 2551 [2022-02-15 13:38:34,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:38:34,542 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 113 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:34,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 220 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 592 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2022-02-15 13:38:34,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2022-02-15 13:38:34,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2343. [2022-02-15 13:38:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 3.322374039282664) internal successors, (7781), 2342 states have internal predecessors, (7781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:34,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 7781 transitions. [2022-02-15 13:38:34,571 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 7781 transitions. Word has length 24 [2022-02-15 13:38:34,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:34,571 INFO L470 AbstractCegarLoop]: Abstraction has 2343 states and 7781 transitions. [2022-02-15 13:38:34,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:34,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 7781 transitions. [2022-02-15 13:38:34,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:34,574 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:34,574 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:34,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Ended with exit code 0 [2022-02-15 13:38:34,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,395 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:34,790 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:34,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:34,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1848423535, now seen corresponding path program 395 times [2022-02-15 13:38:34,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:34,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96262568] [2022-02-15 13:38:34,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:34,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:34,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:34,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96262568] [2022-02-15 13:38:34,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96262568] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:34,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109155895] [2022-02-15 13:38:34,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:38:34,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:34,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:34,979 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) [2022-02-15 13:38:34,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Waiting until timeout for monitored process [2022-02-15 13:38:35,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:38:35,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:35,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:38:35,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:35,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:35,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:38:35,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:35,207 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:38:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:35,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:35,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:35,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-02-15 13:38:35,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:35,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:38:35,968 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:35,968 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 25 treesize of output 27 [2022-02-15 13:38:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:35,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109155895] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:35,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:35,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:35,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847658756] [2022-02-15 13:38:35,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:35,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:35,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:35,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:35,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:35,986 INFO L87 Difference]: Start difference. First operand 2343 states and 7781 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:36,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:36,276 INFO L93 Difference]: Finished difference Result 2807 states and 9128 transitions. [2022-02-15 13:38:36,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:38:36,276 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:38:36,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:36,281 INFO L225 Difference]: With dead ends: 2807 [2022-02-15 13:38:36,281 INFO L226 Difference]: Without dead ends: 2749 [2022-02-15 13:38:36,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:38:36,281 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 154 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:36,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 198 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 463 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-02-15 13:38:36,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2022-02-15 13:38:36,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 2343. [2022-02-15 13:38:36,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 3.322374039282664) internal successors, (7781), 2342 states have internal predecessors, (7781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 7781 transitions. [2022-02-15 13:38:36,313 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 7781 transitions. Word has length 24 [2022-02-15 13:38:36,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:36,313 INFO L470 AbstractCegarLoop]: Abstraction has 2343 states and 7781 transitions. [2022-02-15 13:38:36,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:36,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 7781 transitions. [2022-02-15 13:38:36,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:36,316 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:36,316 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:36,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:36,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable410,396 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:36,519 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:36,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:36,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1831093741, now seen corresponding path program 396 times [2022-02-15 13:38:36,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:36,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595413813] [2022-02-15 13:38:36,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:36,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:36,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:36,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595413813] [2022-02-15 13:38:36,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595413813] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:36,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364237236] [2022-02-15 13:38:36,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:38:36,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:36,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:36,709 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) [2022-02-15 13:38:36,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Waiting until timeout for monitored process [2022-02-15 13:38:36,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:38:36,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:36,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:38:36,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:36,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:36,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:38:36,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:36,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 21 treesize of output 17 [2022-02-15 13:38:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:36,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:37,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:37,304 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 50 treesize of output 47 [2022-02-15 13:38:37,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:37,357 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 31 treesize of output 33 [2022-02-15 13:38:37,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:37,359 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 25 treesize of output 27 [2022-02-15 13:38:37,372 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:37,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364237236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:37,372 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:37,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:37,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618666165] [2022-02-15 13:38:37,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:37,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:37,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:37,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:37,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:37,373 INFO L87 Difference]: Start difference. First operand 2343 states and 7781 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:37,831 INFO L93 Difference]: Finished difference Result 2588 states and 8542 transitions. [2022-02-15 13:38:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 13:38:37,831 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:38:37,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:37,835 INFO L225 Difference]: With dead ends: 2588 [2022-02-15 13:38:37,835 INFO L226 Difference]: Without dead ends: 2566 [2022-02-15 13:38:37,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:38:37,836 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 122 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:37,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 249 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 609 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-02-15 13:38:37,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2022-02-15 13:38:37,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 2339. [2022-02-15 13:38:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 3.3246364414029084) internal successors, (7773), 2338 states have internal predecessors, (7773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:37,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 7773 transitions. [2022-02-15 13:38:37,863 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 7773 transitions. Word has length 24 [2022-02-15 13:38:37,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:37,863 INFO L470 AbstractCegarLoop]: Abstraction has 2339 states and 7773 transitions. [2022-02-15 13:38:37,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:37,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 7773 transitions. [2022-02-15 13:38:37,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:37,866 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:37,866 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:37,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Ended with exit code 0 [2022-02-15 13:38:38,071 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,SelfDestructingSolverStorable411 [2022-02-15 13:38:38,071 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:38,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:38,071 INFO L85 PathProgramCache]: Analyzing trace with hash 700423183, now seen corresponding path program 397 times [2022-02-15 13:38:38,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:38,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294125217] [2022-02-15 13:38:38,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:38,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:38,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:38,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294125217] [2022-02-15 13:38:38,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294125217] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:38,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718036831] [2022-02-15 13:38:38,278 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:38:38,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:38,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:38,279 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) [2022-02-15 13:38:38,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Waiting until timeout for monitored process [2022-02-15 13:38:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:38,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:38:38,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:38,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:38,378 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:38,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:38,675 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 29 treesize of output 23 [2022-02-15 13:38:38,677 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 25 treesize of output 17 [2022-02-15 13:38:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:38,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:39,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:39,102 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 78 treesize of output 70 [2022-02-15 13:38:39,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:39,167 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 35 treesize of output 37 [2022-02-15 13:38:39,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:39,169 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 29 treesize of output 31 [2022-02-15 13:38:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:39,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718036831] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:39,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:39,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:39,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795956338] [2022-02-15 13:38:39,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:39,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:39,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:39,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:39,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:39,183 INFO L87 Difference]: Start difference. First operand 2339 states and 7773 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:39,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:39,481 INFO L93 Difference]: Finished difference Result 2563 states and 8463 transitions. [2022-02-15 13:38:39,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:38:39,482 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:38:39,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:39,497 INFO L225 Difference]: With dead ends: 2563 [2022-02-15 13:38:39,497 INFO L226 Difference]: Without dead ends: 2545 [2022-02-15 13:38:39,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:38:39,497 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 76 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:39,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 270 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 727 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-02-15 13:38:39,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2545 states. [2022-02-15 13:38:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2545 to 2339. [2022-02-15 13:38:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2339 states, 2338 states have (on average 3.3246364414029084) internal successors, (7773), 2338 states have internal predecessors, (7773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:39,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 7773 transitions. [2022-02-15 13:38:39,546 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 7773 transitions. Word has length 24 [2022-02-15 13:38:39,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:39,546 INFO L470 AbstractCegarLoop]: Abstraction has 2339 states and 7773 transitions. [2022-02-15 13:38:39,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:39,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 7773 transitions. [2022-02-15 13:38:39,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:39,549 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:39,549 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:39,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:39,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,398 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:39,763 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:39,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:39,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1515250285, now seen corresponding path program 398 times [2022-02-15 13:38:39,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:39,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828470917] [2022-02-15 13:38:39,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:39,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:39,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:39,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828470917] [2022-02-15 13:38:39,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828470917] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:39,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873632820] [2022-02-15 13:38:39,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:38:39,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:39,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:39,900 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) [2022-02-15 13:38:39,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Waiting until timeout for monitored process [2022-02-15 13:38:39,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:38:39,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:39,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:38:39,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:39,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:39,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:40,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:40,063 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:38:40,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:40,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:40,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:40,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-02-15 13:38:40,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:40,618 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 31 treesize of output 33 [2022-02-15 13:38:40,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:40,621 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 25 treesize of output 27 [2022-02-15 13:38:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:40,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873632820] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:40,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:40,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:40,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139253208] [2022-02-15 13:38:40,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:40,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:40,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:40,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:40,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:40,639 INFO L87 Difference]: Start difference. First operand 2339 states and 7773 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:41,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:41,455 INFO L93 Difference]: Finished difference Result 2585 states and 8547 transitions. [2022-02-15 13:38:41,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:38:41,455 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:38:41,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:41,460 INFO L225 Difference]: With dead ends: 2585 [2022-02-15 13:38:41,460 INFO L226 Difference]: Without dead ends: 2555 [2022-02-15 13:38:41,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:38:41,461 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 132 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:41,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 259 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 746 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2022-02-15 13:38:41,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2022-02-15 13:38:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 2335. [2022-02-15 13:38:41,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2335 states, 2334 states have (on average 3.3243359040274205) internal successors, (7759), 2334 states have internal predecessors, (7759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:41,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2335 states to 2335 states and 7759 transitions. [2022-02-15 13:38:41,490 INFO L78 Accepts]: Start accepts. Automaton has 2335 states and 7759 transitions. Word has length 24 [2022-02-15 13:38:41,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:41,490 INFO L470 AbstractCegarLoop]: Abstraction has 2335 states and 7759 transitions. [2022-02-15 13:38:41,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:41,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2335 states and 7759 transitions. [2022-02-15 13:38:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:41,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:41,493 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:41,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Ended with exit code 0 [2022-02-15 13:38:41,695 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,SelfDestructingSolverStorable413 [2022-02-15 13:38:41,695 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:41,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:41,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1613167285, now seen corresponding path program 399 times [2022-02-15 13:38:41,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:41,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510892445] [2022-02-15 13:38:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:41,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:38:41,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:41,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510892445] [2022-02-15 13:38:41,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510892445] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:41,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332570776] [2022-02-15 13:38:41,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:38:41,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:41,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:41,901 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) [2022-02-15 13:38:41,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Waiting until timeout for monitored process [2022-02-15 13:38:41,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:38:41,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:41,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:38:41,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:42,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:42,013 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:42,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:42,519 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:38:42,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:42,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-02-15 13:38:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:38:42,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:42,965 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:42,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-15 13:38:43,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:43,025 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:38:43,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:43,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:38:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:38:43,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332570776] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:43,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:43,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:38:43,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105770968] [2022-02-15 13:38:43,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:43,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:38:43,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:43,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:38:43,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:38:43,045 INFO L87 Difference]: Start difference. First operand 2335 states and 7759 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) [2022-02-15 13:38:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:43,261 INFO L93 Difference]: Finished difference Result 2527 states and 8282 transitions. [2022-02-15 13:38:43,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:38:43,261 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 24 [2022-02-15 13:38:43,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:43,265 INFO L225 Difference]: With dead ends: 2527 [2022-02-15 13:38:43,265 INFO L226 Difference]: Without dead ends: 2453 [2022-02-15 13:38:43,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:38:43,265 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 61 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:43,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 229 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 444 Invalid, 0 Unknown, 304 Unchecked, 0.1s Time] [2022-02-15 13:38:43,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2022-02-15 13:38:43,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 2333. [2022-02-15 13:38:43,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 2332 states have (on average 3.323327615780446) internal successors, (7750), 2332 states have internal predecessors, (7750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:43,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 7750 transitions. [2022-02-15 13:38:43,292 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 7750 transitions. Word has length 24 [2022-02-15 13:38:43,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:43,293 INFO L470 AbstractCegarLoop]: Abstraction has 2333 states and 7750 transitions. [2022-02-15 13:38:43,293 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) [2022-02-15 13:38:43,293 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 7750 transitions. [2022-02-15 13:38:43,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:43,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:43,295 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:43,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:43,510 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,SelfDestructingSolverStorable414 [2022-02-15 13:38:43,510 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:43,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:43,510 INFO L85 PathProgramCache]: Analyzing trace with hash -434187659, now seen corresponding path program 400 times [2022-02-15 13:38:43,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:43,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515913105] [2022-02-15 13:38:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:43,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:38:43,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:43,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515913105] [2022-02-15 13:38:43,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515913105] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:43,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520002820] [2022-02-15 13:38:43,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:38:43,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:43,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:43,648 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) [2022-02-15 13:38:43,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Waiting until timeout for monitored process [2022-02-15 13:38:43,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:38:43,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:43,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:38:43,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:43,714 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 41 treesize of output 35 [2022-02-15 13:38:43,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:43,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:38:43,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:43,887 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:38:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:38:43,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:44,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:44,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 63 [2022-02-15 13:38:44,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:44,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:38:44,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:44,457 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 29 treesize of output 31 [2022-02-15 13:38:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:38:44,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520002820] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:44,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:44,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:44,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127421352] [2022-02-15 13:38:44,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:44,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:44,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:44,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:44,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:44,472 INFO L87 Difference]: Start difference. First operand 2333 states and 7750 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:45,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:45,115 INFO L93 Difference]: Finished difference Result 2832 states and 9179 transitions. [2022-02-15 13:38:45,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:38:45,116 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:38:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:45,120 INFO L225 Difference]: With dead ends: 2832 [2022-02-15 13:38:45,120 INFO L226 Difference]: Without dead ends: 2710 [2022-02-15 13:38:45,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:38:45,121 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 153 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:45,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 345 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 774 Invalid, 0 Unknown, 166 Unchecked, 0.3s Time] [2022-02-15 13:38:45,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2710 states. [2022-02-15 13:38:45,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2710 to 2354. [2022-02-15 13:38:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2354 states, 2353 states have (on average 3.330641733956651) internal successors, (7837), 2353 states have internal predecessors, (7837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:45,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2354 states to 2354 states and 7837 transitions. [2022-02-15 13:38:45,151 INFO L78 Accepts]: Start accepts. Automaton has 2354 states and 7837 transitions. Word has length 24 [2022-02-15 13:38:45,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:45,151 INFO L470 AbstractCegarLoop]: Abstraction has 2354 states and 7837 transitions. [2022-02-15 13:38:45,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:45,151 INFO L276 IsEmpty]: Start isEmpty. Operand 2354 states and 7837 transitions. [2022-02-15 13:38:45,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:45,154 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:45,154 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:45,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:45,369 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,SelfDestructingSolverStorable415 [2022-02-15 13:38:45,369 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:45,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:45,370 INFO L85 PathProgramCache]: Analyzing trace with hash 976700431, now seen corresponding path program 401 times [2022-02-15 13:38:45,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:45,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998419282] [2022-02-15 13:38:45,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:45,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:38:45,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:45,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998419282] [2022-02-15 13:38:45,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998419282] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:45,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765023402] [2022-02-15 13:38:45,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:38:45,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:45,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:45,487 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) [2022-02-15 13:38:45,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Waiting until timeout for monitored process [2022-02-15 13:38:45,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:38:45,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:45,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:38:45,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:45,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:45,566 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:45,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:45,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:38:45,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:45,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-02-15 13:38:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:38:45,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:46,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:46,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-15 13:38:46,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:46,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:38:46,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:46,418 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 29 treesize of output 31 [2022-02-15 13:38:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:38:46,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765023402] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:46,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:46,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:46,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899049055] [2022-02-15 13:38:46,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:46,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:46,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:46,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:46,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:46,435 INFO L87 Difference]: Start difference. First operand 2354 states and 7837 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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) [2022-02-15 13:38:46,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:46,543 INFO L93 Difference]: Finished difference Result 2489 states and 8232 transitions. [2022-02-15 13:38:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:38:46,543 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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 24 [2022-02-15 13:38:46,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:46,547 INFO L225 Difference]: With dead ends: 2489 [2022-02-15 13:38:46,547 INFO L226 Difference]: Without dead ends: 2444 [2022-02-15 13:38:46,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:38:46,548 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:46,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 252 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 231 Invalid, 0 Unknown, 153 Unchecked, 0.1s Time] [2022-02-15 13:38:46,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2022-02-15 13:38:46,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2357. [2022-02-15 13:38:46,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2356 states have (on average 3.331918505942275) internal successors, (7850), 2356 states have internal predecessors, (7850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:46,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 7850 transitions. [2022-02-15 13:38:46,577 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 7850 transitions. Word has length 24 [2022-02-15 13:38:46,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:46,577 INFO L470 AbstractCegarLoop]: Abstraction has 2357 states and 7850 transitions. [2022-02-15 13:38:46,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 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) [2022-02-15 13:38:46,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 7850 transitions. [2022-02-15 13:38:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:46,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:46,580 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:46,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:46,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,402 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:46,797 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:46,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:46,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1898402571, now seen corresponding path program 402 times [2022-02-15 13:38:46,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:46,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791070443] [2022-02-15 13:38:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:46,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:46,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:38:46,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:46,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791070443] [2022-02-15 13:38:46,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791070443] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:46,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399144341] [2022-02-15 13:38:46,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:38:46,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:46,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:46,916 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) [2022-02-15 13:38:46,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Waiting until timeout for monitored process [2022-02-15 13:38:46,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:38:46,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:46,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 30 conjunts are in the unsatisfiable core [2022-02-15 13:38:46,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:46,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:46,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:47,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:47,387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:38:47,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:38:47,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 25 treesize of output 12 [2022-02-15 13:38:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:38:47,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:47,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:47,900 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 78 treesize of output 70 [2022-02-15 13:38:47,983 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:47,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:38:47,986 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:47,986 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 29 treesize of output 31 [2022-02-15 13:38:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-15 13:38:48,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399144341] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:48,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:48,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 28 [2022-02-15 13:38:48,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926040491] [2022-02-15 13:38:48,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:48,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 13:38:48,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:48,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 13:38:48,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:38:48,002 INFO L87 Difference]: Start difference. First operand 2357 states and 7850 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 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) [2022-02-15 13:38:48,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:48,537 INFO L93 Difference]: Finished difference Result 2595 states and 8516 transitions. [2022-02-15 13:38:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:38:48,537 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 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 24 [2022-02-15 13:38:48,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:48,542 INFO L225 Difference]: With dead ends: 2595 [2022-02-15 13:38:48,542 INFO L226 Difference]: Without dead ends: 2541 [2022-02-15 13:38:48,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:38:48,542 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 101 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:48,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 327 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 701 Invalid, 0 Unknown, 224 Unchecked, 0.2s Time] [2022-02-15 13:38:48,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2022-02-15 13:38:48,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2359. [2022-02-15 13:38:48,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2358 states have (on average 3.330364715860899) internal successors, (7853), 2358 states have internal predecessors, (7853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 7853 transitions. [2022-02-15 13:38:48,569 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 7853 transitions. Word has length 24 [2022-02-15 13:38:48,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:48,569 INFO L470 AbstractCegarLoop]: Abstraction has 2359 states and 7853 transitions. [2022-02-15 13:38:48,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 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) [2022-02-15 13:38:48,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 7853 transitions. [2022-02-15 13:38:48,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:48,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:48,572 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:48,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:48,786 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,SelfDestructingSolverStorable417 [2022-02-15 13:38:48,786 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:48,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:48,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1070654513, now seen corresponding path program 403 times [2022-02-15 13:38:48,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:48,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859007673] [2022-02-15 13:38:48,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:48,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:48,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:38:48,970 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:48,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859007673] [2022-02-15 13:38:48,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859007673] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:48,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418277421] [2022-02-15 13:38:48,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:38:48,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:48,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:48,971 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) [2022-02-15 13:38:48,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Waiting until timeout for monitored process [2022-02-15 13:38:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:48,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:38:48,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:49,043 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 41 treesize of output 35 [2022-02-15 13:38:49,236 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 26 treesize of output 22 [2022-02-15 13:38:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:38:49,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:49,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:49,745 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 80 treesize of output 72 [2022-02-15 13:38:49,801 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:49,801 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 35 treesize of output 37 [2022-02-15 13:38:49,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:49,804 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 29 treesize of output 31 [2022-02-15 13:38:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-15 13:38:49,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418277421] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:49,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:49,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:38:49,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437543872] [2022-02-15 13:38:49,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:49,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:38:49,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:49,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:38:49,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:38:49,815 INFO L87 Difference]: Start difference. First operand 2359 states and 7853 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:51,455 INFO L93 Difference]: Finished difference Result 3784 states and 11723 transitions. [2022-02-15 13:38:51,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 13:38:51,455 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:38:51,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:51,461 INFO L225 Difference]: With dead ends: 3784 [2022-02-15 13:38:51,461 INFO L226 Difference]: Without dead ends: 3597 [2022-02-15 13:38:51,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 13:38:51,462 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 220 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 1622 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:51,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 589 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1622 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 13:38:51,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3597 states. [2022-02-15 13:38:51,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3597 to 2337. [2022-02-15 13:38:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 2336 states have (on average 3.324914383561644) internal successors, (7767), 2336 states have internal predecessors, (7767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 7767 transitions. [2022-02-15 13:38:51,501 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 7767 transitions. Word has length 24 [2022-02-15 13:38:51,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:51,501 INFO L470 AbstractCegarLoop]: Abstraction has 2337 states and 7767 transitions. [2022-02-15 13:38:51,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:51,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 7767 transitions. [2022-02-15 13:38:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:51,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:51,504 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:51,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:51,719 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,SelfDestructingSolverStorable418 [2022-02-15 13:38:51,719 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:51,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:51,720 INFO L85 PathProgramCache]: Analyzing trace with hash 121663541, now seen corresponding path program 404 times [2022-02-15 13:38:51,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:51,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141872313] [2022-02-15 13:38:51,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:51,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:51,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:51,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141872313] [2022-02-15 13:38:51,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141872313] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:51,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748581800] [2022-02-15 13:38:51,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:38:51,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:51,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:51,859 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) [2022-02-15 13:38:51,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Waiting until timeout for monitored process [2022-02-15 13:38:51,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:38:51,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:51,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:38:51,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:51,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:52,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:38:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:52,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:52,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:52,409 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 50 treesize of output 47 [2022-02-15 13:38:52,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:52,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:38:52,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:52,449 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 25 treesize of output 27 [2022-02-15 13:38:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:52,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748581800] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:52,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:52,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:52,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085714119] [2022-02-15 13:38:52,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:52,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:52,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:52,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:52,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:52,463 INFO L87 Difference]: Start difference. First operand 2337 states and 7767 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:53,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:53,679 INFO L93 Difference]: Finished difference Result 2990 states and 9655 transitions. [2022-02-15 13:38:53,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:38:53,679 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:38:53,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:53,683 INFO L225 Difference]: With dead ends: 2990 [2022-02-15 13:38:53,684 INFO L226 Difference]: Without dead ends: 2877 [2022-02-15 13:38:53,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 13:38:53,684 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 136 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:53,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 358 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:38:53,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2022-02-15 13:38:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2350. [2022-02-15 13:38:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2349 states have (on average 3.3243933588761174) internal successors, (7809), 2349 states have internal predecessors, (7809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:53,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 7809 transitions. [2022-02-15 13:38:53,715 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 7809 transitions. Word has length 24 [2022-02-15 13:38:53,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:53,715 INFO L470 AbstractCegarLoop]: Abstraction has 2350 states and 7809 transitions. [2022-02-15 13:38:53,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:53,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 7809 transitions. [2022-02-15 13:38:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:53,718 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:53,718 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:53,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:53,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,405 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:53,934 INFO L402 AbstractCegarLoop]: === Iteration 421 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:53,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:53,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1285596715, now seen corresponding path program 405 times [2022-02-15 13:38:53,934 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:53,934 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021993915] [2022-02-15 13:38:53,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:53,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:54,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:54,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021993915] [2022-02-15 13:38:54,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021993915] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:54,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179584660] [2022-02-15 13:38:54,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:38:54,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:54,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:54,056 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) [2022-02-15 13:38:54,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Waiting until timeout for monitored process [2022-02-15 13:38:54,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:38:54,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:54,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:38:54,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:54,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:38:54,224 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 47 treesize of output 41 [2022-02-15 13:38:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:54,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:54,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:54,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-02-15 13:38:54,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:54,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:38:54,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:54,837 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 25 treesize of output 27 [2022-02-15 13:38:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:54,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179584660] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:54,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:54,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:38:54,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205442014] [2022-02-15 13:38:54,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:54,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:38:54,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:54,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:38:54,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:38:54,850 INFO L87 Difference]: Start difference. First operand 2350 states and 7809 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:57,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:57,205 INFO L93 Difference]: Finished difference Result 3448 states and 10643 transitions. [2022-02-15 13:38:57,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 13:38:57,205 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:38:57,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:57,211 INFO L225 Difference]: With dead ends: 3448 [2022-02-15 13:38:57,211 INFO L226 Difference]: Without dead ends: 3298 [2022-02-15 13:38:57,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=433, Invalid=2429, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 13:38:57,212 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 285 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:57,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 508 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 13:38:57,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3298 states. [2022-02-15 13:38:57,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3298 to 2342. [2022-02-15 13:38:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 3.3263562580093975) internal successors, (7787), 2341 states have internal predecessors, (7787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:57,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 7787 transitions. [2022-02-15 13:38:57,251 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 7787 transitions. Word has length 24 [2022-02-15 13:38:57,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:57,251 INFO L470 AbstractCegarLoop]: Abstraction has 2342 states and 7787 transitions. [2022-02-15 13:38:57,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:38:57,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 7787 transitions. [2022-02-15 13:38:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:57,254 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:57,254 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:57,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Ended with exit code 0 [2022-02-15 13:38:57,459 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,SelfDestructingSolverStorable420 [2022-02-15 13:38:57,459 INFO L402 AbstractCegarLoop]: === Iteration 422 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:57,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:57,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1291769255, now seen corresponding path program 406 times [2022-02-15 13:38:57,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:57,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029427316] [2022-02-15 13:38:57,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:57,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:38:57,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:57,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029427316] [2022-02-15 13:38:57,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029427316] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:57,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370534395] [2022-02-15 13:38:57,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:38:57,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:57,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:57,610 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) [2022-02-15 13:38:57,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Waiting until timeout for monitored process [2022-02-15 13:38:57,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:38:57,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:57,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:38:57,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:57,692 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 26 treesize of output 20 [2022-02-15 13:38:57,805 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 30 treesize of output 24 [2022-02-15 13:38:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:38:57,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:58,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:58,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-02-15 13:38:58,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:58,235 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 35 treesize of output 37 [2022-02-15 13:38:58,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:58,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:38:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:38:58,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370534395] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:58,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:58,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:38:58,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928892082] [2022-02-15 13:38:58,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:58,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:38:58,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:58,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:38:58,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:38:58,255 INFO L87 Difference]: Start difference. First operand 2342 states and 7787 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2022-02-15 13:38:58,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:38:58,864 INFO L93 Difference]: Finished difference Result 3072 states and 9847 transitions. [2022-02-15 13:38:58,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:38:58,864 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 24 [2022-02-15 13:38:58,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:38:58,870 INFO L225 Difference]: With dead ends: 3072 [2022-02-15 13:38:58,870 INFO L226 Difference]: Without dead ends: 2941 [2022-02-15 13:38:58,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:38:58,871 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 148 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:38:58,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 261 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 691 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2022-02-15 13:38:58,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2022-02-15 13:38:58,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2318. [2022-02-15 13:38:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2318 states, 2317 states have (on average 3.320673284419508) internal successors, (7694), 2317 states have internal predecessors, (7694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:38:58,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 7694 transitions. [2022-02-15 13:38:58,904 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 7694 transitions. Word has length 24 [2022-02-15 13:38:58,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:38:58,904 INFO L470 AbstractCegarLoop]: Abstraction has 2318 states and 7694 transitions. [2022-02-15 13:38:58,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2022-02-15 13:38:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 7694 transitions. [2022-02-15 13:38:58,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:38:58,907 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:38:58,907 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:38:58,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Forceful destruction successful, exit code 0 [2022-02-15 13:38:59,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2022-02-15 13:38:59,117 INFO L402 AbstractCegarLoop]: === Iteration 423 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:38:59,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:38:59,117 INFO L85 PathProgramCache]: Analyzing trace with hash -501440335, now seen corresponding path program 407 times [2022-02-15 13:38:59,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:38:59,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328515862] [2022-02-15 13:38:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:38:59,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:38:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:38:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:59,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:38:59,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328515862] [2022-02-15 13:38:59,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328515862] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:38:59,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801706254] [2022-02-15 13:38:59,263 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:38:59,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:38:59,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:38:59,264 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) [2022-02-15 13:38:59,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Waiting until timeout for monitored process [2022-02-15 13:38:59,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:38:59,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:38:59,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:38:59,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:38:59,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:38:59,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:38:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:59,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:38:59,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:59,758 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 79 treesize of output 70 [2022-02-15 13:38:59,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:59,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-15 13:38:59,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:38:59,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 13:38:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:38:59,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801706254] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:38:59,947 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:38:59,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-15 13:38:59,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75337335] [2022-02-15 13:38:59,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:38:59,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:38:59,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:38:59,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:38:59,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:38:59,947 INFO L87 Difference]: Start difference. First operand 2318 states and 7694 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2022-02-15 13:39:00,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:00,282 INFO L93 Difference]: Finished difference Result 2477 states and 8149 transitions. [2022-02-15 13:39:00,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:39:00,282 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 24 [2022-02-15 13:39:00,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:00,286 INFO L225 Difference]: With dead ends: 2477 [2022-02-15 13:39:00,286 INFO L226 Difference]: Without dead ends: 2446 [2022-02-15 13:39:00,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:39:00,287 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 74 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:00,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 218 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:39:00,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2022-02-15 13:39:00,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2325. [2022-02-15 13:39:00,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 2324 states have (on average 3.3197074010327023) internal successors, (7715), 2324 states have internal predecessors, (7715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:00,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 7715 transitions. [2022-02-15 13:39:00,315 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 7715 transitions. Word has length 24 [2022-02-15 13:39:00,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:00,315 INFO L470 AbstractCegarLoop]: Abstraction has 2325 states and 7715 transitions. [2022-02-15 13:39:00,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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) [2022-02-15 13:39:00,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 7715 transitions. [2022-02-15 13:39:00,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:00,318 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:00,318 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:00,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Ended with exit code 0 [2022-02-15 13:39:00,523 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,SelfDestructingSolverStorable422 [2022-02-15 13:39:00,523 INFO L402 AbstractCegarLoop]: === Iteration 424 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:00,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:00,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1577853493, now seen corresponding path program 408 times [2022-02-15 13:39:00,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:00,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411315873] [2022-02-15 13:39:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:00,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:00,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:00,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:00,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411315873] [2022-02-15 13:39:00,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411315873] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:00,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442724850] [2022-02-15 13:39:00,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:39:00,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:00,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:00,694 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) [2022-02-15 13:39:00,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Waiting until timeout for monitored process [2022-02-15 13:39:00,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:39:00,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:00,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:00,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:00,818 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 26 treesize of output 20 [2022-02-15 13:39:00,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:39:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:00,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:01,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:01,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 65 [2022-02-15 13:39:01,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:01,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:39:01,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:01,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:39:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:01,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442724850] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:01,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:01,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-02-15 13:39:01,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453236676] [2022-02-15 13:39:01,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:01,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 13:39:01,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:01,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 13:39:01,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-02-15 13:39:01,456 INFO L87 Difference]: Start difference. First operand 2325 states and 7715 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) [2022-02-15 13:39:01,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:01,932 INFO L93 Difference]: Finished difference Result 2491 states and 8170 transitions. [2022-02-15 13:39:01,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:39:01,932 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 24 [2022-02-15 13:39:01,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:01,937 INFO L225 Difference]: With dead ends: 2491 [2022-02-15 13:39:01,937 INFO L226 Difference]: Without dead ends: 2446 [2022-02-15 13:39:01,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:39:01,937 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 87 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:01,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 226 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:39:01,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2022-02-15 13:39:01,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2332. [2022-02-15 13:39:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2331 states have (on average 3.3217503217503217) internal successors, (7743), 2331 states have internal predecessors, (7743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:01,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 7743 transitions. [2022-02-15 13:39:01,966 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 7743 transitions. Word has length 24 [2022-02-15 13:39:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:01,966 INFO L470 AbstractCegarLoop]: Abstraction has 2332 states and 7743 transitions. [2022-02-15 13:39:01,966 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) [2022-02-15 13:39:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 7743 transitions. [2022-02-15 13:39:01,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:01,969 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:01,969 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:01,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Ended with exit code 0 [2022-02-15 13:39:02,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2022-02-15 13:39:02,171 INFO L402 AbstractCegarLoop]: === Iteration 425 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:02,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:02,171 INFO L85 PathProgramCache]: Analyzing trace with hash -570943043, now seen corresponding path program 409 times [2022-02-15 13:39:02,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:02,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756037206] [2022-02-15 13:39:02,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:02,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:02,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:02,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756037206] [2022-02-15 13:39:02,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756037206] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:02,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313318729] [2022-02-15 13:39:02,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:39:02,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:02,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:02,323 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) [2022-02-15 13:39:02,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Waiting until timeout for monitored process [2022-02-15 13:39:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:02,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:39:02,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:02,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:39:02,476 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 30 treesize of output 24 [2022-02-15 13:39:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:02,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:02,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:02,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-15 13:39:03,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:03,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:39:03,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:03,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:39:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:03,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313318729] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:03,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:03,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:39:03,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996528582] [2022-02-15 13:39:03,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:03,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:39:03,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:03,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:39:03,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:39:03,162 INFO L87 Difference]: Start difference. First operand 2332 states and 7743 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) [2022-02-15 13:39:04,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:04,188 INFO L93 Difference]: Finished difference Result 2835 states and 9091 transitions. [2022-02-15 13:39:04,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:39:04,188 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 24 [2022-02-15 13:39:04,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:04,193 INFO L225 Difference]: With dead ends: 2835 [2022-02-15 13:39:04,193 INFO L226 Difference]: Without dead ends: 2651 [2022-02-15 13:39:04,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:39:04,193 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 206 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:04,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 293 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:39:04,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2022-02-15 13:39:04,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2332. [2022-02-15 13:39:04,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2331 states have (on average 3.3217503217503217) internal successors, (7743), 2331 states have internal predecessors, (7743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:04,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 7743 transitions. [2022-02-15 13:39:04,224 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 7743 transitions. Word has length 24 [2022-02-15 13:39:04,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:04,224 INFO L470 AbstractCegarLoop]: Abstraction has 2332 states and 7743 transitions. [2022-02-15 13:39:04,224 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) [2022-02-15 13:39:04,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 7743 transitions. [2022-02-15 13:39:04,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:04,227 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:04,227 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:04,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:04,441 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,SelfDestructingSolverStorable424 [2022-02-15 13:39:04,441 INFO L402 AbstractCegarLoop]: === Iteration 426 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:04,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:04,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1339053953, now seen corresponding path program 410 times [2022-02-15 13:39:04,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:04,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66137363] [2022-02-15 13:39:04,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:04,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:04,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:04,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66137363] [2022-02-15 13:39:04,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66137363] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:04,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478645924] [2022-02-15 13:39:04,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:39:04,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:04,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:04,583 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) [2022-02-15 13:39:04,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Waiting until timeout for monitored process [2022-02-15 13:39:04,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:39:04,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:04,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:04,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:04,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:04,762 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:39:05,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:05,247 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:39:05,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:05,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:39:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:05,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:05,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:05,736 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 83 treesize of output 74 [2022-02-15 13:39:05,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:05,892 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 31 treesize of output 33 [2022-02-15 13:39:05,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:05,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:39:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:05,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478645924] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:05,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:05,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:39:05,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997160490] [2022-02-15 13:39:05,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:05,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:39:05,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:05,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:39:05,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:39:05,916 INFO L87 Difference]: Start difference. First operand 2332 states and 7743 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:06,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:06,193 INFO L93 Difference]: Finished difference Result 2459 states and 8089 transitions. [2022-02-15 13:39:06,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:39:06,193 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:39:06,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:06,197 INFO L225 Difference]: With dead ends: 2459 [2022-02-15 13:39:06,197 INFO L226 Difference]: Without dead ends: 2400 [2022-02-15 13:39:06,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:39:06,198 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 68 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:06,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 154 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 354 Invalid, 0 Unknown, 281 Unchecked, 0.1s Time] [2022-02-15 13:39:06,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2400 states. [2022-02-15 13:39:06,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2400 to 2334. [2022-02-15 13:39:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2333 states have (on average 3.3219031290184313) internal successors, (7750), 2333 states have internal predecessors, (7750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 7750 transitions. [2022-02-15 13:39:06,227 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 7750 transitions. Word has length 24 [2022-02-15 13:39:06,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:06,227 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 7750 transitions. [2022-02-15 13:39:06,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:06,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 7750 transitions. [2022-02-15 13:39:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:06,231 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:06,231 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:06,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:06,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,411 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:06,453 INFO L402 AbstractCegarLoop]: === Iteration 427 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:06,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:06,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1791980169, now seen corresponding path program 411 times [2022-02-15 13:39:06,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:06,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128335874] [2022-02-15 13:39:06,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:06,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:06,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:06,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128335874] [2022-02-15 13:39:06,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128335874] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:06,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106341214] [2022-02-15 13:39:06,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:39:06,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:06,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:06,652 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) [2022-02-15 13:39:06,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Waiting until timeout for monitored process [2022-02-15 13:39:06,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:39:06,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:06,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:06,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:06,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:39:06,823 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 47 treesize of output 41 [2022-02-15 13:39:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:06,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:07,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:07,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:39:07,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:07,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:39:07,620 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:07,620 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 25 treesize of output 27 [2022-02-15 13:39:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:07,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106341214] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:07,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:07,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:39:07,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403931213] [2022-02-15 13:39:07,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:07,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:39:07,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:07,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:39:07,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:39:07,638 INFO L87 Difference]: Start difference. First operand 2334 states and 7750 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:08,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:08,347 INFO L93 Difference]: Finished difference Result 2722 states and 8841 transitions. [2022-02-15 13:39:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:39:08,347 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:39:08,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:08,352 INFO L225 Difference]: With dead ends: 2722 [2022-02-15 13:39:08,352 INFO L226 Difference]: Without dead ends: 2648 [2022-02-15 13:39:08,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:39:08,352 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 113 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:08,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 305 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:39:08,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2022-02-15 13:39:08,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2350. [2022-02-15 13:39:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 2349 states have (on average 3.3214133673903787) internal successors, (7802), 2349 states have internal predecessors, (7802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:08,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 7802 transitions. [2022-02-15 13:39:08,389 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 7802 transitions. Word has length 24 [2022-02-15 13:39:08,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:08,389 INFO L470 AbstractCegarLoop]: Abstraction has 2350 states and 7802 transitions. [2022-02-15 13:39:08,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:08,390 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 7802 transitions. [2022-02-15 13:39:08,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:08,393 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:08,393 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:08,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:08,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2022-02-15 13:39:08,606 INFO L402 AbstractCegarLoop]: === Iteration 428 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:08,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1647604797, now seen corresponding path program 412 times [2022-02-15 13:39:08,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:08,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251054906] [2022-02-15 13:39:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:08,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:08,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:08,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251054906] [2022-02-15 13:39:08,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251054906] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:08,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172933513] [2022-02-15 13:39:08,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:39:08,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:08,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:08,782 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) [2022-02-15 13:39:08,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Waiting until timeout for monitored process [2022-02-15 13:39:08,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:39:08,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:08,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:39:08,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:08,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:39:09,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:39:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:09,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:09,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:09,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-15 13:39:09,583 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:09,584 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 35 treesize of output 37 [2022-02-15 13:39:09,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:09,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:39:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:09,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172933513] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:09,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:09,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:39:09,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448384722] [2022-02-15 13:39:09,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:09,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:39:09,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:09,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:39:09,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:39:09,598 INFO L87 Difference]: Start difference. First operand 2350 states and 7802 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-02-15 13:39:10,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:10,186 INFO L93 Difference]: Finished difference Result 2727 states and 8862 transitions. [2022-02-15 13:39:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:39:10,186 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 24 [2022-02-15 13:39:10,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:10,191 INFO L225 Difference]: With dead ends: 2727 [2022-02-15 13:39:10,191 INFO L226 Difference]: Without dead ends: 2617 [2022-02-15 13:39:10,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:39:10,192 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 112 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:10,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 321 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:39:10,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2022-02-15 13:39:10,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 2360. [2022-02-15 13:39:10,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 3.320474777448071) internal successors, (7833), 2359 states have internal predecessors, (7833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 7833 transitions. [2022-02-15 13:39:10,222 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 7833 transitions. Word has length 24 [2022-02-15 13:39:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:10,222 INFO L470 AbstractCegarLoop]: Abstraction has 2360 states and 7833 transitions. [2022-02-15 13:39:10,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-02-15 13:39:10,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 7833 transitions. [2022-02-15 13:39:10,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:10,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:10,225 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:10,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:10,441 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,SelfDestructingSolverStorable427 [2022-02-15 13:39:10,441 INFO L402 AbstractCegarLoop]: === Iteration 429 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:10,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1428373569, now seen corresponding path program 413 times [2022-02-15 13:39:10,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:10,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905273835] [2022-02-15 13:39:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:10,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:10,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:10,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905273835] [2022-02-15 13:39:10,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905273835] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:10,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920100354] [2022-02-15 13:39:10,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:39:10,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:10,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:10,599 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) [2022-02-15 13:39:10,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Waiting until timeout for monitored process [2022-02-15 13:39:10,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:39:10,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:10,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:39:10,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:10,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:10,716 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:39:10,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:10,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 22 [2022-02-15 13:39:11,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:11,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 12 treesize of output 3 [2022-02-15 13:39:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:11,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:11,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:11,539 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 110 treesize of output 98 [2022-02-15 13:39:11,665 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:11,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:39:11,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:11,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:39:11,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:11,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920100354] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:11,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:11,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:39:11,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812177915] [2022-02-15 13:39:11,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:11,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:39:11,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:11,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:39:11,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:39:11,682 INFO L87 Difference]: Start difference. First operand 2360 states and 7833 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:12,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:12,198 INFO L93 Difference]: Finished difference Result 2743 states and 8850 transitions. [2022-02-15 13:39:12,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:39:12,198 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:39:12,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:12,203 INFO L225 Difference]: With dead ends: 2743 [2022-02-15 13:39:12,203 INFO L226 Difference]: Without dead ends: 2590 [2022-02-15 13:39:12,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:39:12,204 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 137 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:12,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 290 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 749 Invalid, 0 Unknown, 159 Unchecked, 0.2s Time] [2022-02-15 13:39:12,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2022-02-15 13:39:12,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2354. [2022-02-15 13:39:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2354 states, 2353 states have (on average 3.3212919677008075) internal successors, (7815), 2353 states have internal predecessors, (7815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:12,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2354 states to 2354 states and 7815 transitions. [2022-02-15 13:39:12,236 INFO L78 Accepts]: Start accepts. Automaton has 2354 states and 7815 transitions. Word has length 24 [2022-02-15 13:39:12,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:12,236 INFO L470 AbstractCegarLoop]: Abstraction has 2354 states and 7815 transitions. [2022-02-15 13:39:12,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:12,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2354 states and 7815 transitions. [2022-02-15 13:39:12,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:12,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:12,239 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:12,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Ended with exit code 0 [2022-02-15 13:39:12,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,414 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:12,443 INFO L402 AbstractCegarLoop]: === Iteration 430 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:12,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:12,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1508307085, now seen corresponding path program 414 times [2022-02-15 13:39:12,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:12,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316755777] [2022-02-15 13:39:12,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:12,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:12,680 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:12,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:12,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316755777] [2022-02-15 13:39:12,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316755777] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:12,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910273328] [2022-02-15 13:39:12,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:39:12,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:12,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:12,681 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) [2022-02-15 13:39:12,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Waiting until timeout for monitored process [2022-02-15 13:39:12,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:39:12,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:12,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:39:12,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:12,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:39:12,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:12,843 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:39:12,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:12,845 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:39:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:12,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:13,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:13,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-15 13:39:13,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:13,547 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 35 treesize of output 37 [2022-02-15 13:39:13,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:13,550 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 29 treesize of output 31 [2022-02-15 13:39:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:13,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910273328] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:13,562 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:13,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:39:13,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285453223] [2022-02-15 13:39:13,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:13,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:39:13,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:13,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:39:13,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:39:13,563 INFO L87 Difference]: Start difference. First operand 2354 states and 7815 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:15,310 INFO L93 Difference]: Finished difference Result 3478 states and 10695 transitions. [2022-02-15 13:39:15,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 13:39:15,310 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:39:15,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:15,316 INFO L225 Difference]: With dead ends: 3478 [2022-02-15 13:39:15,316 INFO L226 Difference]: Without dead ends: 3243 [2022-02-15 13:39:15,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=344, Invalid=2008, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 13:39:15,317 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 374 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:15,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 431 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1122 Invalid, 0 Unknown, 142 Unchecked, 0.4s Time] [2022-02-15 13:39:15,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2022-02-15 13:39:15,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 2354. [2022-02-15 13:39:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2354 states, 2353 states have (on average 3.3212919677008075) internal successors, (7815), 2353 states have internal predecessors, (7815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:15,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2354 states to 2354 states and 7815 transitions. [2022-02-15 13:39:15,368 INFO L78 Accepts]: Start accepts. Automaton has 2354 states and 7815 transitions. Word has length 24 [2022-02-15 13:39:15,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:15,368 INFO L470 AbstractCegarLoop]: Abstraction has 2354 states and 7815 transitions. [2022-02-15 13:39:15,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:15,368 INFO L276 IsEmpty]: Start isEmpty. Operand 2354 states and 7815 transitions. [2022-02-15 13:39:15,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:15,371 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:15,371 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:15,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Ended with exit code 0 [2022-02-15 13:39:15,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,415 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:15,587 INFO L402 AbstractCegarLoop]: === Iteration 431 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:15,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:15,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2052879115, now seen corresponding path program 415 times [2022-02-15 13:39:15,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:15,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535622124] [2022-02-15 13:39:15,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:15,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:15,707 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:15,707 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:15,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535622124] [2022-02-15 13:39:15,707 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535622124] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:15,707 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675413614] [2022-02-15 13:39:15,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:39:15,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:15,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:15,708 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) [2022-02-15 13:39:15,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Waiting until timeout for monitored process [2022-02-15 13:39:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:15,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:39:15,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:15,799 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 26 treesize of output 20 [2022-02-15 13:39:15,893 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 30 treesize of output 24 [2022-02-15 13:39:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:15,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:16,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:16,213 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 111 treesize of output 97 [2022-02-15 13:39:16,350 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:16,351 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 35 treesize of output 37 [2022-02-15 13:39:16,353 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:16,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:39:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:16,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675413614] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:16,363 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:16,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:39:16,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313242355] [2022-02-15 13:39:16,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:16,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:39:16,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:16,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:39:16,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:39:16,364 INFO L87 Difference]: Start difference. First operand 2354 states and 7815 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) [2022-02-15 13:39:16,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:16,748 INFO L93 Difference]: Finished difference Result 2664 states and 8701 transitions. [2022-02-15 13:39:16,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:39:16,748 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 24 [2022-02-15 13:39:16,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:16,753 INFO L225 Difference]: With dead ends: 2664 [2022-02-15 13:39:16,753 INFO L226 Difference]: Without dead ends: 2566 [2022-02-15 13:39:16,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:39:16,753 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 99 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:16,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 188 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:39:16,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2566 states. [2022-02-15 13:39:16,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2566 to 2364. [2022-02-15 13:39:16,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2363 states have (on average 3.318239526026238) internal successors, (7841), 2363 states have internal predecessors, (7841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:16,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 7841 transitions. [2022-02-15 13:39:16,783 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 7841 transitions. Word has length 24 [2022-02-15 13:39:16,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:16,783 INFO L470 AbstractCegarLoop]: Abstraction has 2364 states and 7841 transitions. [2022-02-15 13:39:16,783 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) [2022-02-15 13:39:16,783 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 7841 transitions. [2022-02-15 13:39:16,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:16,785 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:16,786 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:16,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:16,995 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,SelfDestructingSolverStorable430 [2022-02-15 13:39:16,995 INFO L402 AbstractCegarLoop]: === Iteration 432 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:16,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:16,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1833647887, now seen corresponding path program 416 times [2022-02-15 13:39:16,996 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:16,996 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530457971] [2022-02-15 13:39:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:16,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:17,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:17,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530457971] [2022-02-15 13:39:17,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530457971] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:17,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869146868] [2022-02-15 13:39:17,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:39:17,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:17,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:17,159 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) [2022-02-15 13:39:17,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Waiting until timeout for monitored process [2022-02-15 13:39:17,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:39:17,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:17,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:17,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:17,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:17,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:39:17,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:17,412 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:39:17,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:17,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:39:17,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:17,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:17,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:17,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-02-15 13:39:17,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:17,953 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 31 treesize of output 33 [2022-02-15 13:39:17,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:17,955 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 25 treesize of output 27 [2022-02-15 13:39:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:17,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869146868] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:17,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:17,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:39:17,968 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63304515] [2022-02-15 13:39:17,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:17,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:39:17,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:17,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:39:17,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:39:17,968 INFO L87 Difference]: Start difference. First operand 2364 states and 7841 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) [2022-02-15 13:39:18,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:18,179 INFO L93 Difference]: Finished difference Result 2487 states and 8163 transitions. [2022-02-15 13:39:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:39:18,179 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 24 [2022-02-15 13:39:18,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:18,183 INFO L225 Difference]: With dead ends: 2487 [2022-02-15 13:39:18,183 INFO L226 Difference]: Without dead ends: 2424 [2022-02-15 13:39:18,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:39:18,183 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 84 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:18,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 148 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 453 Invalid, 0 Unknown, 199 Unchecked, 0.1s Time] [2022-02-15 13:39:18,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2424 states. [2022-02-15 13:39:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2424 to 2355. [2022-02-15 13:39:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.3190314358538657) internal successors, (7813), 2354 states have internal predecessors, (7813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 7813 transitions. [2022-02-15 13:39:18,210 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 7813 transitions. Word has length 24 [2022-02-15 13:39:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:18,210 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 7813 transitions. [2022-02-15 13:39:18,210 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) [2022-02-15 13:39:18,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 7813 transitions. [2022-02-15 13:39:18,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:18,213 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:18,213 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:18,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:18,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2022-02-15 13:39:18,429 INFO L402 AbstractCegarLoop]: === Iteration 433 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:18,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:18,429 INFO L85 PathProgramCache]: Analyzing trace with hash 208012791, now seen corresponding path program 417 times [2022-02-15 13:39:18,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:18,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999832157] [2022-02-15 13:39:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:18,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:18,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:18,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999832157] [2022-02-15 13:39:18,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999832157] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:18,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774966562] [2022-02-15 13:39:18,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:39:18,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:18,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:18,536 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) [2022-02-15 13:39:18,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Waiting until timeout for monitored process [2022-02-15 13:39:18,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:39:18,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:18,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:18,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:18,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:39:18,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:39:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:18,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:18,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:18,953 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 73 treesize of output 66 [2022-02-15 13:39:19,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:19,084 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 31 treesize of output 33 [2022-02-15 13:39:19,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:19,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:39:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:19,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774966562] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:19,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:19,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:39:19,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436203183] [2022-02-15 13:39:19,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:19,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:39:19,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:19,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:39:19,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:39:19,100 INFO L87 Difference]: Start difference. First operand 2355 states and 7813 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) [2022-02-15 13:39:19,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:19,419 INFO L93 Difference]: Finished difference Result 2575 states and 8448 transitions. [2022-02-15 13:39:19,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:39:19,420 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 24 [2022-02-15 13:39:19,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:19,423 INFO L225 Difference]: With dead ends: 2575 [2022-02-15 13:39:19,423 INFO L226 Difference]: Without dead ends: 2544 [2022-02-15 13:39:19,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:39:19,424 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 91 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:19,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 244 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:39:19,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2544 states. [2022-02-15 13:39:19,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2544 to 2355. [2022-02-15 13:39:19,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.3190314358538657) internal successors, (7813), 2354 states have internal predecessors, (7813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:19,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 7813 transitions. [2022-02-15 13:39:19,451 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 7813 transitions. Word has length 24 [2022-02-15 13:39:19,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:19,451 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 7813 transitions. [2022-02-15 13:39:19,451 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) [2022-02-15 13:39:19,451 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 7813 transitions. [2022-02-15 13:39:19,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:19,454 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:19,454 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:19,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:19,667 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,SelfDestructingSolverStorable432 [2022-02-15 13:39:19,667 INFO L402 AbstractCegarLoop]: === Iteration 434 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:19,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:19,667 INFO L85 PathProgramCache]: Analyzing trace with hash -373747989, now seen corresponding path program 418 times [2022-02-15 13:39:19,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:19,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834932855] [2022-02-15 13:39:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:19,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:19,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:19,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834932855] [2022-02-15 13:39:19,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834932855] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:19,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638182257] [2022-02-15 13:39:19,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:39:19,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:19,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:19,813 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) [2022-02-15 13:39:19,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Waiting until timeout for monitored process [2022-02-15 13:39:19,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:39:19,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:19,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:39:19,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:19,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:19,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:39:19,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:19,972 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:39:19,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:19,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:39:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:20,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:20,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:20,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-15 13:39:20,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:20,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-02-15 13:39:20,650 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:20,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-02-15 13:39:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:20,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638182257] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:20,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:20,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:39:20,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763487209] [2022-02-15 13:39:20,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:20,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:39:20,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:20,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:39:20,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:39:20,664 INFO L87 Difference]: Start difference. First operand 2355 states and 7813 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:21,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:21,955 INFO L93 Difference]: Finished difference Result 2985 states and 9422 transitions. [2022-02-15 13:39:21,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:39:21,955 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:39:21,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:21,960 INFO L225 Difference]: With dead ends: 2985 [2022-02-15 13:39:21,961 INFO L226 Difference]: Without dead ends: 2781 [2022-02-15 13:39:21,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:39:21,961 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 247 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:21,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 497 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1113 Invalid, 0 Unknown, 61 Unchecked, 0.4s Time] [2022-02-15 13:39:21,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2022-02-15 13:39:21,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2356. [2022-02-15 13:39:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 3.31932059447983) internal successors, (7817), 2355 states have internal predecessors, (7817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 7817 transitions. [2022-02-15 13:39:21,993 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 7817 transitions. Word has length 24 [2022-02-15 13:39:21,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:21,993 INFO L470 AbstractCegarLoop]: Abstraction has 2356 states and 7817 transitions. [2022-02-15 13:39:21,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:21,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 7817 transitions. [2022-02-15 13:39:21,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:21,996 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:21,996 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:22,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Ended with exit code 0 [2022-02-15 13:39:22,211 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,SelfDestructingSolverStorable433 [2022-02-15 13:39:22,212 INFO L402 AbstractCegarLoop]: === Iteration 435 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:22,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:22,212 INFO L85 PathProgramCache]: Analyzing trace with hash -489268703, now seen corresponding path program 419 times [2022-02-15 13:39:22,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:22,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716392318] [2022-02-15 13:39:22,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:22,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:22,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:22,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716392318] [2022-02-15 13:39:22,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716392318] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:22,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123009267] [2022-02-15 13:39:22,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:39:22,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:22,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:22,362 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) [2022-02-15 13:39:22,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Waiting until timeout for monitored process [2022-02-15 13:39:22,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:39:22,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:22,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:22,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:22,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:22,459 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:39:22,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:22,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:39:22,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:22,534 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:39:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:22,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:22,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:22,953 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 72 treesize of output 65 [2022-02-15 13:39:23,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:23,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:39:23,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:23,065 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 25 treesize of output 27 [2022-02-15 13:39:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:23,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123009267] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:23,079 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:23,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:39:23,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198973896] [2022-02-15 13:39:23,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:23,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:39:23,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:23,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:39:23,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:39:23,079 INFO L87 Difference]: Start difference. First operand 2356 states and 7817 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) [2022-02-15 13:39:23,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:23,359 INFO L93 Difference]: Finished difference Result 2487 states and 8202 transitions. [2022-02-15 13:39:23,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:39:23,359 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 24 [2022-02-15 13:39:23,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:23,364 INFO L225 Difference]: With dead ends: 2487 [2022-02-15 13:39:23,364 INFO L226 Difference]: Without dead ends: 2441 [2022-02-15 13:39:23,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:39:23,364 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:23,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 164 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 555 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-02-15 13:39:23,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2022-02-15 13:39:23,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2363. [2022-02-15 13:39:23,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2363 states, 2362 states have (on average 3.3213378492802708) internal successors, (7845), 2362 states have internal predecessors, (7845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2363 states to 2363 states and 7845 transitions. [2022-02-15 13:39:23,391 INFO L78 Accepts]: Start accepts. Automaton has 2363 states and 7845 transitions. Word has length 24 [2022-02-15 13:39:23,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:23,391 INFO L470 AbstractCegarLoop]: Abstraction has 2363 states and 7845 transitions. [2022-02-15 13:39:23,391 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) [2022-02-15 13:39:23,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2363 states and 7845 transitions. [2022-02-15 13:39:23,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:23,394 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:23,394 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:23,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:23,607 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,SelfDestructingSolverStorable434 [2022-02-15 13:39:23,607 INFO L402 AbstractCegarLoop]: === Iteration 436 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:23,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:23,607 INFO L85 PathProgramCache]: Analyzing trace with hash -2037832877, now seen corresponding path program 420 times [2022-02-15 13:39:23,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:23,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498303915] [2022-02-15 13:39:23,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:23,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:23,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:23,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498303915] [2022-02-15 13:39:23,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498303915] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:23,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776984917] [2022-02-15 13:39:23,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:39:23,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:23,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:23,786 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) [2022-02-15 13:39:23,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Waiting until timeout for monitored process [2022-02-15 13:39:23,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:39:23,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:23,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:23,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:23,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:23,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:39:24,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:24,098 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-15 13:39:24,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:24,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-02-15 13:39:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:24,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:24,747 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:24,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 71 [2022-02-15 13:39:24,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:24,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:39:24,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:24,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:39:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:24,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776984917] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:24,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:24,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:39:24,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813352184] [2022-02-15 13:39:24,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:24,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:39:24,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:24,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:39:24,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:39:24,885 INFO L87 Difference]: Start difference. First operand 2363 states and 7845 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-02-15 13:39:25,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:25,156 INFO L93 Difference]: Finished difference Result 2492 states and 8190 transitions. [2022-02-15 13:39:25,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:39:25,156 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 24 [2022-02-15 13:39:25,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:25,161 INFO L225 Difference]: With dead ends: 2492 [2022-02-15 13:39:25,162 INFO L226 Difference]: Without dead ends: 2461 [2022-02-15 13:39:25,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:39:25,162 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:25,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 192 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 386 Invalid, 0 Unknown, 178 Unchecked, 0.1s Time] [2022-02-15 13:39:25,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2022-02-15 13:39:25,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 2387. [2022-02-15 13:39:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 3.3147527242246437) internal successors, (7909), 2386 states have internal predecessors, (7909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:25,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 7909 transitions. [2022-02-15 13:39:25,194 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 7909 transitions. Word has length 24 [2022-02-15 13:39:25,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:25,194 INFO L470 AbstractCegarLoop]: Abstraction has 2387 states and 7909 transitions. [2022-02-15 13:39:25,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-02-15 13:39:25,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 7909 transitions. [2022-02-15 13:39:25,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:25,197 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:25,197 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:25,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Ended with exit code 0 [2022-02-15 13:39:25,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435,421 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:25,399 INFO L402 AbstractCegarLoop]: === Iteration 437 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:25,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1581752491, now seen corresponding path program 421 times [2022-02-15 13:39:25,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:25,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709487793] [2022-02-15 13:39:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:25,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:25,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:25,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709487793] [2022-02-15 13:39:25,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709487793] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:25,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286518159] [2022-02-15 13:39:25,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:39:25,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:25,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:25,567 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) [2022-02-15 13:39:25,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Waiting until timeout for monitored process [2022-02-15 13:39:25,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:25,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:25,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:25,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:25,708 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:39:25,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:25,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:39:25,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:25,961 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-02-15 13:39:26,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:26,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:26,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:26,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:39:26,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:26,864 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 31 treesize of output 33 [2022-02-15 13:39:26,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:26,892 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 25 treesize of output 27 [2022-02-15 13:39:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:26,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286518159] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:26,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:26,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:39:26,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008906923] [2022-02-15 13:39:26,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:26,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:39:26,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:26,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:39:26,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:39:26,919 INFO L87 Difference]: Start difference. First operand 2387 states and 7909 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2022-02-15 13:39:27,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:27,076 INFO L93 Difference]: Finished difference Result 2501 states and 8199 transitions. [2022-02-15 13:39:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:39:27,076 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 24 [2022-02-15 13:39:27,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:27,081 INFO L225 Difference]: With dead ends: 2501 [2022-02-15 13:39:27,081 INFO L226 Difference]: Without dead ends: 2474 [2022-02-15 13:39:27,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:39:27,081 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:27,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 157 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 344 Invalid, 0 Unknown, 176 Unchecked, 0.1s Time] [2022-02-15 13:39:27,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2022-02-15 13:39:27,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 2356. [2022-02-15 13:39:27,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 2355 states have (on average 3.31932059447983) internal successors, (7817), 2355 states have internal predecessors, (7817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:27,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 7817 transitions. [2022-02-15 13:39:27,109 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 7817 transitions. Word has length 24 [2022-02-15 13:39:27,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:27,110 INFO L470 AbstractCegarLoop]: Abstraction has 2356 states and 7817 transitions. [2022-02-15 13:39:27,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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) [2022-02-15 13:39:27,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 7817 transitions. [2022-02-15 13:39:27,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:27,112 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:27,113 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:27,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:27,320 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,SelfDestructingSolverStorable436 [2022-02-15 13:39:27,320 INFO L402 AbstractCegarLoop]: === Iteration 438 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:27,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:27,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1772731649, now seen corresponding path program 422 times [2022-02-15 13:39:27,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:27,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227723926] [2022-02-15 13:39:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:27,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:27,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:27,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227723926] [2022-02-15 13:39:27,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227723926] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:27,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074602877] [2022-02-15 13:39:27,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:39:27,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:27,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:27,456 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) [2022-02-15 13:39:27,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Waiting until timeout for monitored process [2022-02-15 13:39:27,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:39:27,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:27,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:27,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:27,575 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 41 treesize of output 35 [2022-02-15 13:39:27,646 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 43 treesize of output 37 [2022-02-15 13:39:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:27,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:28,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:28,228 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 141 treesize of output 121 [2022-02-15 13:39:28,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:28,436 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 31 treesize of output 33 [2022-02-15 13:39:28,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:28,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:39:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:28,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074602877] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:28,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:28,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:39:28,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449337749] [2022-02-15 13:39:28,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:28,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:39:28,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:28,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:39:28,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:39:28,458 INFO L87 Difference]: Start difference. First operand 2356 states and 7817 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:29,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:29,308 INFO L93 Difference]: Finished difference Result 2758 states and 8911 transitions. [2022-02-15 13:39:29,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:39:29,308 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:39:29,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:29,313 INFO L225 Difference]: With dead ends: 2758 [2022-02-15 13:39:29,313 INFO L226 Difference]: Without dead ends: 2657 [2022-02-15 13:39:29,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:39:29,313 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 104 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:29,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 284 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:39:29,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2022-02-15 13:39:29,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2366. [2022-02-15 13:39:29,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2365 states have (on average 3.3167019027484144) internal successors, (7844), 2365 states have internal predecessors, (7844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:29,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 7844 transitions. [2022-02-15 13:39:29,346 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 7844 transitions. Word has length 24 [2022-02-15 13:39:29,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:29,346 INFO L470 AbstractCegarLoop]: Abstraction has 2366 states and 7844 transitions. [2022-02-15 13:39:29,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:29,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 7844 transitions. [2022-02-15 13:39:29,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:29,349 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:29,349 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:29,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:29,563 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,SelfDestructingSolverStorable437 [2022-02-15 13:39:29,563 INFO L402 AbstractCegarLoop]: === Iteration 439 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:29,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:29,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1981244799, now seen corresponding path program 423 times [2022-02-15 13:39:29,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:29,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056823691] [2022-02-15 13:39:29,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:29,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:29,693 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:39:29,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:29,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056823691] [2022-02-15 13:39:29,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056823691] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:29,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403244917] [2022-02-15 13:39:29,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:39:29,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:29,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:29,694 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) [2022-02-15 13:39:29,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Waiting until timeout for monitored process [2022-02-15 13:39:29,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:39:29,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:29,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:29,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:29,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:29,804 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:39:29,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:29,906 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:39:29,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:29,908 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:39:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:39:29,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:30,267 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:30,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 71 [2022-02-15 13:39:30,353 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:30,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-02-15 13:39:30,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:30,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-02-15 13:39:30,368 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:39:30,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403244917] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:30,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:30,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:39:30,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114527887] [2022-02-15 13:39:30,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:30,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:39:30,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:30,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:39:30,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:39:30,369 INFO L87 Difference]: Start difference. First operand 2366 states and 7844 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:30,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:30,673 INFO L93 Difference]: Finished difference Result 2498 states and 8174 transitions. [2022-02-15 13:39:30,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:39:30,673 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:39:30,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:30,677 INFO L225 Difference]: With dead ends: 2498 [2022-02-15 13:39:30,677 INFO L226 Difference]: Without dead ends: 2464 [2022-02-15 13:39:30,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-02-15 13:39:30,678 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 289 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:30,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 285 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 627 Invalid, 0 Unknown, 289 Unchecked, 0.2s Time] [2022-02-15 13:39:30,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2022-02-15 13:39:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 2355. [2022-02-15 13:39:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 2354 states have (on average 3.3190314358538657) internal successors, (7813), 2354 states have internal predecessors, (7813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:30,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 7813 transitions. [2022-02-15 13:39:30,706 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 7813 transitions. Word has length 24 [2022-02-15 13:39:30,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:30,706 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 7813 transitions. [2022-02-15 13:39:30,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 7813 transitions. [2022-02-15 13:39:30,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:30,709 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:30,709 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:30,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:30,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,424 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:30,924 INFO L402 AbstractCegarLoop]: === Iteration 440 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:30,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:30,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1143111857, now seen corresponding path program 424 times [2022-02-15 13:39:30,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:30,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836599316] [2022-02-15 13:39:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:30,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:31,043 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:31,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836599316] [2022-02-15 13:39:31,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836599316] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:31,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419290001] [2022-02-15 13:39:31,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:39:31,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:31,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:31,044 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) [2022-02-15 13:39:31,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Waiting until timeout for monitored process [2022-02-15 13:39:31,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:39:31,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:31,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:39:31,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:31,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-15 13:39:31,202 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 36 treesize of output 28 [2022-02-15 13:39:31,204 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 17 treesize of output 13 [2022-02-15 13:39:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:31,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:31,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:31,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 57 [2022-02-15 13:39:31,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:31,603 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 117 treesize of output 103 [2022-02-15 13:39:31,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:31,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 81 [2022-02-15 13:39:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:31,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419290001] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:31,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:31,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:39:31,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962567390] [2022-02-15 13:39:31,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:31,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:39:31,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:31,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:39:31,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:39:31,680 INFO L87 Difference]: Start difference. First operand 2355 states and 7813 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:32,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:32,091 INFO L93 Difference]: Finished difference Result 2545 states and 8314 transitions. [2022-02-15 13:39:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:39:32,091 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:39:32,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:32,095 INFO L225 Difference]: With dead ends: 2545 [2022-02-15 13:39:32,095 INFO L226 Difference]: Without dead ends: 2455 [2022-02-15 13:39:32,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:39:32,095 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:32,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 276 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:39:32,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2022-02-15 13:39:32,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2360. [2022-02-15 13:39:32,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 3.3187791437049596) internal successors, (7829), 2359 states have internal predecessors, (7829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:32,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 7829 transitions. [2022-02-15 13:39:32,122 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 7829 transitions. Word has length 24 [2022-02-15 13:39:32,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:32,122 INFO L470 AbstractCegarLoop]: Abstraction has 2360 states and 7829 transitions. [2022-02-15 13:39:32,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:32,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 7829 transitions. [2022-02-15 13:39:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:32,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:32,125 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:32,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:32,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,425 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:32,341 INFO L402 AbstractCegarLoop]: === Iteration 441 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:32,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:32,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1987922265, now seen corresponding path program 425 times [2022-02-15 13:39:32,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:32,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121410422] [2022-02-15 13:39:32,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:32,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:32,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:32,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121410422] [2022-02-15 13:39:32,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121410422] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:32,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555397854] [2022-02-15 13:39:32,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:39:32,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:32,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:32,444 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) [2022-02-15 13:39:32,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Waiting until timeout for monitored process [2022-02-15 13:39:32,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:39:32,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:32,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:39:32,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:32,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:32,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 53 treesize of output 45 [2022-02-15 13:39:32,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:32,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:39:32,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:32,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:39:32,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:32,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:33,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:33,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 61 [2022-02-15 13:39:33,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:33,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 107 [2022-02-15 13:39:33,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:33,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 85 [2022-02-15 13:39:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:33,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555397854] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:33,250 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:33,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:39:33,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814912096] [2022-02-15 13:39:33,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:33,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:39:33,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:33,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:39:33,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:39:33,251 INFO L87 Difference]: Start difference. First operand 2360 states and 7829 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) [2022-02-15 13:39:33,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:33,719 INFO L93 Difference]: Finished difference Result 2731 states and 8777 transitions. [2022-02-15 13:39:33,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:39:33,719 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 24 [2022-02-15 13:39:33,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:33,724 INFO L225 Difference]: With dead ends: 2731 [2022-02-15 13:39:33,724 INFO L226 Difference]: Without dead ends: 2620 [2022-02-15 13:39:33,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:39:33,724 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 78 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:33,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 390 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1044 Invalid, 0 Unknown, 175 Unchecked, 0.3s Time] [2022-02-15 13:39:33,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2022-02-15 13:39:33,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 2362. [2022-02-15 13:39:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2361 states have (on average 3.318085556967387) internal successors, (7834), 2361 states have internal predecessors, (7834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 7834 transitions. [2022-02-15 13:39:33,753 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 7834 transitions. Word has length 24 [2022-02-15 13:39:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:33,753 INFO L470 AbstractCegarLoop]: Abstraction has 2362 states and 7834 transitions. [2022-02-15 13:39:33,753 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) [2022-02-15 13:39:33,753 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 7834 transitions. [2022-02-15 13:39:33,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:33,756 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:33,756 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:33,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:33,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,426 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:33,972 INFO L402 AbstractCegarLoop]: === Iteration 442 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:33,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:33,972 INFO L85 PathProgramCache]: Analyzing trace with hash -512304687, now seen corresponding path program 426 times [2022-02-15 13:39:33,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:33,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462264585] [2022-02-15 13:39:33,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:33,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:34,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:34,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462264585] [2022-02-15 13:39:34,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462264585] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:34,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655736436] [2022-02-15 13:39:34,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:39:34,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:34,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:34,090 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) [2022-02-15 13:39:34,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Waiting until timeout for monitored process [2022-02-15 13:39:34,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:39:34,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:34,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:39:34,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:34,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:34,201 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-02-15 13:39:34,236 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 42 treesize of output 36 [2022-02-15 13:39:34,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:34,238 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:39:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:34,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:34,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:34,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-02-15 13:39:34,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:34,852 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 117 treesize of output 103 [2022-02-15 13:39:34,856 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:34,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 81 [2022-02-15 13:39:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:34,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655736436] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:34,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:34,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:39:34,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640591101] [2022-02-15 13:39:34,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:34,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:39:34,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:34,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:39:34,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:39:34,914 INFO L87 Difference]: Start difference. First operand 2362 states and 7834 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) [2022-02-15 13:39:35,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:35,284 INFO L93 Difference]: Finished difference Result 2583 states and 8400 transitions. [2022-02-15 13:39:35,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:39:35,284 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 24 [2022-02-15 13:39:35,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:35,289 INFO L225 Difference]: With dead ends: 2583 [2022-02-15 13:39:35,289 INFO L226 Difference]: Without dead ends: 2499 [2022-02-15 13:39:35,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:39:35,289 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:35,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 255 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:39:35,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2022-02-15 13:39:35,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 2360. [2022-02-15 13:39:35,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 2359 states have (on average 3.3187791437049596) internal successors, (7829), 2359 states have internal predecessors, (7829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:35,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 7829 transitions. [2022-02-15 13:39:35,318 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 7829 transitions. Word has length 24 [2022-02-15 13:39:35,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:35,318 INFO L470 AbstractCegarLoop]: Abstraction has 2360 states and 7829 transitions. [2022-02-15 13:39:35,318 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) [2022-02-15 13:39:35,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 7829 transitions. [2022-02-15 13:39:35,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:35,321 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:35,321 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:35,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:35,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2022-02-15 13:39:35,536 INFO L402 AbstractCegarLoop]: === Iteration 443 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:35,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:35,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2118253429, now seen corresponding path program 427 times [2022-02-15 13:39:35,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:35,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723877018] [2022-02-15 13:39:35,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:35,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:35,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:35,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723877018] [2022-02-15 13:39:35,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723877018] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:35,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626338975] [2022-02-15 13:39:35,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:39:35,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:35,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:35,658 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) [2022-02-15 13:39:35,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Waiting until timeout for monitored process [2022-02-15 13:39:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:35,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:39:35,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:35,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:35,744 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:39:36,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:36,114 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:39:36,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:36,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:39:36,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:36,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:36,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:36,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-02-15 13:39:36,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:36,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 104 [2022-02-15 13:39:36,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:36,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 82 [2022-02-15 13:39:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:36,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626338975] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:36,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:36,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:39:36,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697475767] [2022-02-15 13:39:36,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:36,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:39:36,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:36,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:39:36,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:39:36,676 INFO L87 Difference]: Start difference. First operand 2360 states and 7829 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:37,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:37,006 INFO L93 Difference]: Finished difference Result 2482 states and 8160 transitions. [2022-02-15 13:39:37,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:39:37,007 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:39:37,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:37,011 INFO L225 Difference]: With dead ends: 2482 [2022-02-15 13:39:37,011 INFO L226 Difference]: Without dead ends: 2423 [2022-02-15 13:39:37,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:39:37,011 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:37,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 194 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 543 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-02-15 13:39:37,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2022-02-15 13:39:37,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2361. [2022-02-15 13:39:37,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2360 states have (on average 3.3190677966101694) internal successors, (7833), 2360 states have internal predecessors, (7833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:37,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 7833 transitions. [2022-02-15 13:39:37,039 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 7833 transitions. Word has length 24 [2022-02-15 13:39:37,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:37,039 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 7833 transitions. [2022-02-15 13:39:37,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:37,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 7833 transitions. [2022-02-15 13:39:37,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:37,042 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:37,042 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:37,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:37,258 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,SelfDestructingSolverStorable442 [2022-02-15 13:39:37,258 INFO L402 AbstractCegarLoop]: === Iteration 444 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:37,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:37,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1012780693, now seen corresponding path program 428 times [2022-02-15 13:39:37,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:37,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531477942] [2022-02-15 13:39:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:37,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:37,430 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:37,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531477942] [2022-02-15 13:39:37,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531477942] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:37,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480191719] [2022-02-15 13:39:37,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:39:37,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:37,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:37,431 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) [2022-02-15 13:39:37,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Waiting until timeout for monitored process [2022-02-15 13:39:37,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:39:37,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:37,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:37,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:37,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:39:37,555 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 47 treesize of output 41 [2022-02-15 13:39:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:37,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:38,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:38,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 72 [2022-02-15 13:39:38,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:38,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2022-02-15 13:39:38,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:38,410 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 69 treesize of output 60 [2022-02-15 13:39:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:38,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480191719] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:38,514 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:38,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:39:38,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100745449] [2022-02-15 13:39:38,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:38,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:39:38,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:38,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:39:38,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:39:38,515 INFO L87 Difference]: Start difference. First operand 2361 states and 7833 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:38,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:38,814 INFO L93 Difference]: Finished difference Result 2712 states and 8788 transitions. [2022-02-15 13:39:38,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:39:38,814 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:39:38,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:38,819 INFO L225 Difference]: With dead ends: 2712 [2022-02-15 13:39:38,819 INFO L226 Difference]: Without dead ends: 2619 [2022-02-15 13:39:38,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:39:38,819 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 98 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:38,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 177 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:39:38,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2022-02-15 13:39:38,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 2365. [2022-02-15 13:39:38,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 3.320642978003384) internal successors, (7850), 2364 states have internal predecessors, (7850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 7850 transitions. [2022-02-15 13:39:38,851 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 7850 transitions. Word has length 24 [2022-02-15 13:39:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:38,851 INFO L470 AbstractCegarLoop]: Abstraction has 2365 states and 7850 transitions. [2022-02-15 13:39:38,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:38,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 7850 transitions. [2022-02-15 13:39:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:38,854 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:38,854 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:38,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:39,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable443,429 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:39,070 INFO L402 AbstractCegarLoop]: === Iteration 445 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:39,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:39,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1868163023, now seen corresponding path program 429 times [2022-02-15 13:39:39,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:39,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224820208] [2022-02-15 13:39:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:39,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:39,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:39,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224820208] [2022-02-15 13:39:39,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224820208] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:39,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438092019] [2022-02-15 13:39:39,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:39:39,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:39,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:39,209 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) [2022-02-15 13:39:39,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Waiting until timeout for monitored process [2022-02-15 13:39:39,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:39:39,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:39,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:39:39,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:39,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:39,315 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:39:39,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:39,585 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:39:39,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:39,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-02-15 13:39:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:39,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:39,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:39,956 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 82 treesize of output 78 [2022-02-15 13:39:40,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:40,036 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 118 treesize of output 104 [2022-02-15 13:39:40,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:40,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 82 [2022-02-15 13:39:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:40,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438092019] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:40,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:40,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:39:40,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895598490] [2022-02-15 13:39:40,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:40,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:39:40,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:40,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:39:40,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:39:40,123 INFO L87 Difference]: Start difference. First operand 2365 states and 7850 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:40,380 INFO L93 Difference]: Finished difference Result 2492 states and 8173 transitions. [2022-02-15 13:39:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:39:40,381 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:39:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:40,385 INFO L225 Difference]: With dead ends: 2492 [2022-02-15 13:39:40,385 INFO L226 Difference]: Without dead ends: 2421 [2022-02-15 13:39:40,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:39:40,385 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:40,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 165 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 510 Invalid, 0 Unknown, 118 Unchecked, 0.2s Time] [2022-02-15 13:39:40,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2022-02-15 13:39:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 2365. [2022-02-15 13:39:40,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 3.3189509306260576) internal successors, (7846), 2364 states have internal predecessors, (7846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 7846 transitions. [2022-02-15 13:39:40,411 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 7846 transitions. Word has length 24 [2022-02-15 13:39:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:40,411 INFO L470 AbstractCegarLoop]: Abstraction has 2365 states and 7846 transitions. [2022-02-15 13:39:40,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:40,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 7846 transitions. [2022-02-15 13:39:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:40,414 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:40,414 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:40,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Ended with exit code 0 [2022-02-15 13:39:40,629 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,SelfDestructingSolverStorable444 [2022-02-15 13:39:40,629 INFO L402 AbstractCegarLoop]: === Iteration 446 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:40,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2087394251, now seen corresponding path program 430 times [2022-02-15 13:39:40,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:40,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218584221] [2022-02-15 13:39:40,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:40,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:40,797 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:40,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:40,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218584221] [2022-02-15 13:39:40,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218584221] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:40,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207375877] [2022-02-15 13:39:40,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:39:40,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:40,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:40,798 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) [2022-02-15 13:39:40,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Waiting until timeout for monitored process [2022-02-15 13:39:40,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:39:40,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:40,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:40,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:40,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:39:41,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:39:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:41,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:41,713 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:41,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-02-15 13:39:41,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:41,833 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 144 treesize of output 124 [2022-02-15 13:39:41,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:41,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 96 [2022-02-15 13:39:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:41,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207375877] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:41,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:41,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:39:41,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492869407] [2022-02-15 13:39:41,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:41,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:39:41,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:39:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:39:41,943 INFO L87 Difference]: Start difference. First operand 2365 states and 7846 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:42,377 INFO L93 Difference]: Finished difference Result 2572 states and 8381 transitions. [2022-02-15 13:39:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:39:42,378 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:39:42,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:42,382 INFO L225 Difference]: With dead ends: 2572 [2022-02-15 13:39:42,382 INFO L226 Difference]: Without dead ends: 2495 [2022-02-15 13:39:42,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:39:42,382 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 85 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:42,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 226 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:39:42,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2022-02-15 13:39:42,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2361. [2022-02-15 13:39:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2360 states have (on average 3.3190677966101694) internal successors, (7833), 2360 states have internal predecessors, (7833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 7833 transitions. [2022-02-15 13:39:42,411 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 7833 transitions. Word has length 24 [2022-02-15 13:39:42,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:42,411 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 7833 transitions. [2022-02-15 13:39:42,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:42,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 7833 transitions. [2022-02-15 13:39:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:42,414 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:42,414 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:42,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:42,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,431 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:42,622 INFO L402 AbstractCegarLoop]: === Iteration 447 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:42,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:42,623 INFO L85 PathProgramCache]: Analyzing trace with hash -729107609, now seen corresponding path program 431 times [2022-02-15 13:39:42,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:42,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488537753] [2022-02-15 13:39:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:42,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:42,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:42,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:42,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488537753] [2022-02-15 13:39:42,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488537753] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:42,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004848804] [2022-02-15 13:39:42,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:39:42,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:42,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:42,850 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) [2022-02-15 13:39:42,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Waiting until timeout for monitored process [2022-02-15 13:39:42,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-15 13:39:42,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:42,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:39:42,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:42,962 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 41 treesize of output 35 [2022-02-15 13:39:43,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:43,033 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:39:43,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:43,036 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:39:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:43,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:43,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:43,792 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 77 treesize of output 75 [2022-02-15 13:39:43,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:43,873 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 109 treesize of output 97 [2022-02-15 13:39:43,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:43,877 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 89 treesize of output 77 [2022-02-15 13:39:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:43,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004848804] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:43,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:43,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:39:43,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566509715] [2022-02-15 13:39:43,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:43,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:39:43,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:43,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:39:43,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:39:43,937 INFO L87 Difference]: Start difference. First operand 2361 states and 7833 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:45,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:45,030 INFO L93 Difference]: Finished difference Result 3090 states and 9689 transitions. [2022-02-15 13:39:45,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 13:39:45,031 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:39:45,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:45,035 INFO L225 Difference]: With dead ends: 3090 [2022-02-15 13:39:45,035 INFO L226 Difference]: Without dead ends: 2948 [2022-02-15 13:39:45,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=212, Invalid=1194, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 13:39:45,036 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 184 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:45,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 388 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 981 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-02-15 13:39:45,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2948 states. [2022-02-15 13:39:45,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2948 to 2365. [2022-02-15 13:39:45,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 3.319373942470389) internal successors, (7847), 2364 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:45,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 7847 transitions. [2022-02-15 13:39:45,069 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 7847 transitions. Word has length 24 [2022-02-15 13:39:45,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:45,069 INFO L470 AbstractCegarLoop]: Abstraction has 2365 states and 7847 transitions. [2022-02-15 13:39:45,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:45,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 7847 transitions. [2022-02-15 13:39:45,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:45,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:45,072 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:45,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:45,287 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,SelfDestructingSolverStorable446 [2022-02-15 13:39:45,287 INFO L402 AbstractCegarLoop]: === Iteration 448 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:45,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:45,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1302032373, now seen corresponding path program 432 times [2022-02-15 13:39:45,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:45,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469756974] [2022-02-15 13:39:45,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:45,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:45,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:45,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469756974] [2022-02-15 13:39:45,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469756974] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:45,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761311297] [2022-02-15 13:39:45,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:39:45,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:45,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:45,447 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) [2022-02-15 13:39:45,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Waiting until timeout for monitored process [2022-02-15 13:39:45,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-15 13:39:45,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:45,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:45,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:45,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:39:45,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:45,574 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:39:45,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:45,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:39:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:45,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:46,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:46,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-02-15 13:39:46,152 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:46,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 127 [2022-02-15 13:39:46,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:46,157 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 119 treesize of output 99 [2022-02-15 13:39:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:46,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761311297] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:46,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:46,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:39:46,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985311321] [2022-02-15 13:39:46,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:46,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:39:46,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:46,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:39:46,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:39:46,236 INFO L87 Difference]: Start difference. First operand 2365 states and 7847 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:46,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:46,456 INFO L93 Difference]: Finished difference Result 2483 states and 8164 transitions. [2022-02-15 13:39:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:39:46,456 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:39:46,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:46,461 INFO L225 Difference]: With dead ends: 2483 [2022-02-15 13:39:46,461 INFO L226 Difference]: Without dead ends: 2452 [2022-02-15 13:39:46,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:39:46,461 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 51 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:46,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 179 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 632 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-02-15 13:39:46,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2022-02-15 13:39:46,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 2362. [2022-02-15 13:39:46,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2361 states have (on average 3.319356204997882) internal successors, (7837), 2361 states have internal predecessors, (7837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:46,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 7837 transitions. [2022-02-15 13:39:46,490 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 7837 transitions. Word has length 24 [2022-02-15 13:39:46,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:46,490 INFO L470 AbstractCegarLoop]: Abstraction has 2362 states and 7837 transitions. [2022-02-15 13:39:46,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:46,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 7837 transitions. [2022-02-15 13:39:46,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:46,493 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:46,493 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:46,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:46,709 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,SelfDestructingSolverStorable447 [2022-02-15 13:39:46,709 INFO L402 AbstractCegarLoop]: === Iteration 449 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:46,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:46,710 INFO L85 PathProgramCache]: Analyzing trace with hash -308373675, now seen corresponding path program 433 times [2022-02-15 13:39:46,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:46,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296839239] [2022-02-15 13:39:46,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:46,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:46,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:46,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296839239] [2022-02-15 13:39:46,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296839239] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:46,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670517827] [2022-02-15 13:39:46,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:39:46,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:46,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:46,835 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) [2022-02-15 13:39:46,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Waiting until timeout for monitored process [2022-02-15 13:39:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:46,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:46,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:46,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:39:46,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-15 13:39:46,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-02-15 13:39:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:47,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:47,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:47,469 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 100 treesize of output 94 [2022-02-15 13:39:47,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:47,612 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 144 treesize of output 124 [2022-02-15 13:39:47,616 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:47,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 96 [2022-02-15 13:39:47,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:47,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670517827] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:47,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:47,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:39:47,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758099885] [2022-02-15 13:39:47,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:47,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:39:47,714 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:47,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:39:47,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:39:47,714 INFO L87 Difference]: Start difference. First operand 2362 states and 7837 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:48,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:48,180 INFO L93 Difference]: Finished difference Result 2565 states and 8357 transitions. [2022-02-15 13:39:48,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:39:48,181 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:39:48,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:48,185 INFO L225 Difference]: With dead ends: 2565 [2022-02-15 13:39:48,185 INFO L226 Difference]: Without dead ends: 2460 [2022-02-15 13:39:48,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:39:48,185 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:48,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 319 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 660 Invalid, 0 Unknown, 273 Unchecked, 0.2s Time] [2022-02-15 13:39:48,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2022-02-15 13:39:48,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2365. [2022-02-15 13:39:48,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 3.319373942470389) internal successors, (7847), 2364 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 7847 transitions. [2022-02-15 13:39:48,213 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 7847 transitions. Word has length 24 [2022-02-15 13:39:48,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:48,213 INFO L470 AbstractCegarLoop]: Abstraction has 2365 states and 7847 transitions. [2022-02-15 13:39:48,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:48,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 7847 transitions. [2022-02-15 13:39:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:48,216 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:48,216 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:48,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:48,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable448,434 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:48,432 INFO L402 AbstractCegarLoop]: === Iteration 450 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:48,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:48,432 INFO L85 PathProgramCache]: Analyzing trace with hash 177169, now seen corresponding path program 434 times [2022-02-15 13:39:48,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:48,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679887603] [2022-02-15 13:39:48,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:48,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:48,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:48,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679887603] [2022-02-15 13:39:48,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679887603] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:48,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911154113] [2022-02-15 13:39:48,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:39:48,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:48,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:48,634 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) [2022-02-15 13:39:48,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Waiting until timeout for monitored process [2022-02-15 13:39:48,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:39:48,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:48,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:48,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:48,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:48,728 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:39:48,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:48,778 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 13:39:48,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:48,781 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:39:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:48,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:49,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:49,517 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 131 treesize of output 121 [2022-02-15 13:39:49,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:49,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 76 [2022-02-15 13:39:49,738 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:49,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 58 [2022-02-15 13:39:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:49,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911154113] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:49,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:49,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:39:49,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179182976] [2022-02-15 13:39:49,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:49,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:39:49,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:49,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:39:49,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:39:49,852 INFO L87 Difference]: Start difference. First operand 2365 states and 7847 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:50,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:50,864 INFO L93 Difference]: Finished difference Result 2633 states and 8518 transitions. [2022-02-15 13:39:50,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:39:50,865 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:39:50,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:50,869 INFO L225 Difference]: With dead ends: 2633 [2022-02-15 13:39:50,869 INFO L226 Difference]: Without dead ends: 2540 [2022-02-15 13:39:50,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=158, Invalid=898, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:39:50,869 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 163 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:50,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 240 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 763 Invalid, 0 Unknown, 276 Unchecked, 0.4s Time] [2022-02-15 13:39:50,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2022-02-15 13:39:50,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2368. [2022-02-15 13:39:50,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 3.3193916349809887) internal successors, (7857), 2367 states have internal predecessors, (7857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:50,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 7857 transitions. [2022-02-15 13:39:50,898 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 7857 transitions. Word has length 24 [2022-02-15 13:39:50,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:50,898 INFO L470 AbstractCegarLoop]: Abstraction has 2368 states and 7857 transitions. [2022-02-15 13:39:50,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 7857 transitions. [2022-02-15 13:39:50,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:50,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:50,901 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:50,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:51,115 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,SelfDestructingSolverStorable449 [2022-02-15 13:39:51,115 INFO L402 AbstractCegarLoop]: === Iteration 451 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:51,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:51,116 INFO L85 PathProgramCache]: Analyzing trace with hash -572747595, now seen corresponding path program 435 times [2022-02-15 13:39:51,116 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:51,116 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99384378] [2022-02-15 13:39:51,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:51,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:51,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:51,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99384378] [2022-02-15 13:39:51,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99384378] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:51,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002685670] [2022-02-15 13:39:51,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:39:51,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:51,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:51,366 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) [2022-02-15 13:39:51,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Waiting until timeout for monitored process [2022-02-15 13:39:51,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:39:51,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:51,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:39:51,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:51,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:51,486 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:39:51,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:51,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 36 [2022-02-15 13:39:51,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:51,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:39:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:51,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:52,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:52,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 123 [2022-02-15 13:39:52,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:52,582 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 117 treesize of output 103 [2022-02-15 13:39:52,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:52,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 81 [2022-02-15 13:39:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:52,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002685670] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:52,686 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:52,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:39:52,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825766465] [2022-02-15 13:39:52,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:52,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:39:52,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:52,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:39:52,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:39:52,687 INFO L87 Difference]: Start difference. First operand 2368 states and 7857 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:53,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:53,724 INFO L93 Difference]: Finished difference Result 3242 states and 10170 transitions. [2022-02-15 13:39:53,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 13:39:53,725 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:39:53,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:53,730 INFO L225 Difference]: With dead ends: 3242 [2022-02-15 13:39:53,730 INFO L226 Difference]: Without dead ends: 3046 [2022-02-15 13:39:53,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:39:53,730 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 246 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:53,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 275 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 759 Invalid, 0 Unknown, 93 Unchecked, 0.3s Time] [2022-02-15 13:39:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2022-02-15 13:39:53,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 2365. [2022-02-15 13:39:53,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 3.319373942470389) internal successors, (7847), 2364 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:53,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 7847 transitions. [2022-02-15 13:39:53,765 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 7847 transitions. Word has length 24 [2022-02-15 13:39:53,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:53,765 INFO L470 AbstractCegarLoop]: Abstraction has 2365 states and 7847 transitions. [2022-02-15 13:39:53,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:53,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 7847 transitions. [2022-02-15 13:39:53,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:53,768 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:53,768 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:53,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:53,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,436 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:53,973 INFO L402 AbstractCegarLoop]: === Iteration 452 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:53,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:53,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1163752117, now seen corresponding path program 436 times [2022-02-15 13:39:53,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:53,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487891532] [2022-02-15 13:39:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:53,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:54,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:54,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487891532] [2022-02-15 13:39:54,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487891532] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:54,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620974447] [2022-02-15 13:39:54,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:39:54,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:54,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:54,176 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) [2022-02-15 13:39:54,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Waiting until timeout for monitored process [2022-02-15 13:39:54,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:39:54,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:54,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:54,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:54,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:54,300 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:39:54,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:54,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:39:54,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:54,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 21 [2022-02-15 13:39:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:54,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:54,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:54,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2022-02-15 13:39:55,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:55,032 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 146 treesize of output 126 [2022-02-15 13:39:55,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:55,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 98 [2022-02-15 13:39:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:55,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620974447] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:55,172 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:55,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:39:55,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070229237] [2022-02-15 13:39:55,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:55,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:39:55,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:55,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:39:55,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:39:55,172 INFO L87 Difference]: Start difference. First operand 2365 states and 7847 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:55,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:55,728 INFO L93 Difference]: Finished difference Result 2532 states and 8231 transitions. [2022-02-15 13:39:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:39:55,728 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:39:55,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:55,732 INFO L225 Difference]: With dead ends: 2532 [2022-02-15 13:39:55,732 INFO L226 Difference]: Without dead ends: 2458 [2022-02-15 13:39:55,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:39:55,733 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 86 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:55,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 232 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 726 Invalid, 0 Unknown, 185 Unchecked, 0.2s Time] [2022-02-15 13:39:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2022-02-15 13:39:55,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2365. [2022-02-15 13:39:55,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2365 states, 2364 states have (on average 3.319373942470389) internal successors, (7847), 2364 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:55,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2365 states to 2365 states and 7847 transitions. [2022-02-15 13:39:55,760 INFO L78 Accepts]: Start accepts. Automaton has 2365 states and 7847 transitions. Word has length 24 [2022-02-15 13:39:55,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:55,760 INFO L470 AbstractCegarLoop]: Abstraction has 2365 states and 7847 transitions. [2022-02-15 13:39:55,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:39:55,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2365 states and 7847 transitions. [2022-02-15 13:39:55,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:55,763 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:55,763 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:55,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Ended with exit code 0 [2022-02-15 13:39:55,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,437 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:55,976 INFO L402 AbstractCegarLoop]: === Iteration 453 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:55,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:55,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1380500405, now seen corresponding path program 437 times [2022-02-15 13:39:55,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:55,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161850106] [2022-02-15 13:39:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:55,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:39:56,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:56,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161850106] [2022-02-15 13:39:56,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161850106] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:56,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827017247] [2022-02-15 13:39:56,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:39:56,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:56,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:56,102 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) [2022-02-15 13:39:56,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Waiting until timeout for monitored process [2022-02-15 13:39:56,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:39:56,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:56,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:56,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:56,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:56,180 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:39:56,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:56,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-15 13:39:56,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:39:56,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-02-15 13:39:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:39:56,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:56,697 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:56,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 119 [2022-02-15 13:39:56,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:56,847 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 80 treesize of output 73 [2022-02-15 13:39:56,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:56,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 57 [2022-02-15 13:39:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:39:56,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827017247] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:56,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:56,972 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:39:56,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981028988] [2022-02-15 13:39:56,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:56,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:39:56,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:56,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:39:56,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:39:56,973 INFO L87 Difference]: Start difference. First operand 2365 states and 7847 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:57,423 INFO L93 Difference]: Finished difference Result 2456 states and 8073 transitions. [2022-02-15 13:39:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:39:57,423 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:39:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:57,427 INFO L225 Difference]: With dead ends: 2456 [2022-02-15 13:39:57,427 INFO L226 Difference]: Without dead ends: 2437 [2022-02-15 13:39:57,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:39:57,428 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:57,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 267 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 650 Invalid, 0 Unknown, 186 Unchecked, 0.2s Time] [2022-02-15 13:39:57,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2022-02-15 13:39:57,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 2363. [2022-02-15 13:39:57,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2363 states, 2362 states have (on average 3.3200677392040645) internal successors, (7842), 2362 states have internal predecessors, (7842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:57,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2363 states to 2363 states and 7842 transitions. [2022-02-15 13:39:57,470 INFO L78 Accepts]: Start accepts. Automaton has 2363 states and 7842 transitions. Word has length 24 [2022-02-15 13:39:57,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:57,470 INFO L470 AbstractCegarLoop]: Abstraction has 2363 states and 7842 transitions. [2022-02-15 13:39:57,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:57,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2363 states and 7842 transitions. [2022-02-15 13:39:57,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:57,473 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:57,473 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:57,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Forceful destruction successful, exit code 0 [2022-02-15 13:39:57,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,438 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:57,689 INFO L402 AbstractCegarLoop]: === Iteration 454 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:57,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:57,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1796855399, now seen corresponding path program 438 times [2022-02-15 13:39:57,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:57,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859409363] [2022-02-15 13:39:57,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:57,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:57,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:57,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859409363] [2022-02-15 13:39:57,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859409363] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:57,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136708483] [2022-02-15 13:39:57,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:39:57,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:57,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:57,831 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) [2022-02-15 13:39:57,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Waiting until timeout for monitored process [2022-02-15 13:39:57,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:39:57,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:39:57,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:57,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:39:57,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:39:57,999 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 26 treesize of output 22 [2022-02-15 13:39:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:58,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:39:58,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:58,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-02-15 13:39:58,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:58,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-15 13:39:58,639 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:39:58,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 13:39:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:58,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136708483] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:39:58,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:39:58,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:39:58,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889675017] [2022-02-15 13:39:58,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:39:58,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:39:58,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:39:58,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:39:58,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:39:58,688 INFO L87 Difference]: Start difference. First operand 2363 states and 7842 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:39:59,458 INFO L93 Difference]: Finished difference Result 2539 states and 8359 transitions. [2022-02-15 13:39:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:39:59,458 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:39:59,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:39:59,462 INFO L225 Difference]: With dead ends: 2539 [2022-02-15 13:39:59,463 INFO L226 Difference]: Without dead ends: 2480 [2022-02-15 13:39:59,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:39:59,463 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:39:59,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 174 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 13:39:59,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2022-02-15 13:39:59,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2381. [2022-02-15 13:39:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 3.316386554621849) internal successors, (7893), 2380 states have internal predecessors, (7893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 7893 transitions. [2022-02-15 13:39:59,491 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 7893 transitions. Word has length 24 [2022-02-15 13:39:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:39:59,491 INFO L470 AbstractCegarLoop]: Abstraction has 2381 states and 7893 transitions. [2022-02-15 13:39:59,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:39:59,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 7893 transitions. [2022-02-15 13:39:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:39:59,494 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:39:59,494 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:39:59,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Ended with exit code 0 [2022-02-15 13:39:59,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,439 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:59,711 INFO L402 AbstractCegarLoop]: === Iteration 455 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:39:59,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:39:59,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1334178723, now seen corresponding path program 439 times [2022-02-15 13:39:59,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:39:59,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391494065] [2022-02-15 13:39:59,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:39:59,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:39:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:39:59,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:39:59,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391494065] [2022-02-15 13:39:59,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391494065] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:39:59,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927715144] [2022-02-15 13:39:59,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:39:59,891 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:39:59,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:39:59,892 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) [2022-02-15 13:39:59,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Waiting until timeout for monitored process [2022-02-15 13:39:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:39:59,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:39:59,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:00,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:00,021 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:40:00,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:00,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 49 treesize of output 41 [2022-02-15 13:40:00,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:00,538 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-02-15 13:40:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:00,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:01,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:01,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:40:01,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:01,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-15 13:40:01,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:01,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-02-15 13:40:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:01,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927715144] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:01,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:01,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:40:01,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922196879] [2022-02-15 13:40:01,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:01,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:40:01,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:01,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:40:01,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:40:01,490 INFO L87 Difference]: Start difference. First operand 2381 states and 7893 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-02-15 13:40:01,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:01,777 INFO L93 Difference]: Finished difference Result 2521 states and 8256 transitions. [2022-02-15 13:40:01,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:40:01,778 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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 24 [2022-02-15 13:40:01,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:01,782 INFO L225 Difference]: With dead ends: 2521 [2022-02-15 13:40:01,783 INFO L226 Difference]: Without dead ends: 2455 [2022-02-15 13:40:01,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:40:01,783 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:01,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 214 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 614 Invalid, 0 Unknown, 117 Unchecked, 0.3s Time] [2022-02-15 13:40:01,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2022-02-15 13:40:01,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2381. [2022-02-15 13:40:01,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 3.316386554621849) internal successors, (7893), 2380 states have internal predecessors, (7893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 7893 transitions. [2022-02-15 13:40:01,813 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 7893 transitions. Word has length 24 [2022-02-15 13:40:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:01,813 INFO L470 AbstractCegarLoop]: Abstraction has 2381 states and 7893 transitions. [2022-02-15 13:40:01,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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) [2022-02-15 13:40:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 7893 transitions. [2022-02-15 13:40:01,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:01,816 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:01,816 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:01,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:02,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 440 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2022-02-15 13:40:02,033 INFO L402 AbstractCegarLoop]: === Iteration 456 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:02,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:02,033 INFO L85 PathProgramCache]: Analyzing trace with hash 35150211, now seen corresponding path program 440 times [2022-02-15 13:40:02,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:02,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772772685] [2022-02-15 13:40:02,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:02,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:02,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:02,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772772685] [2022-02-15 13:40:02,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772772685] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:02,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333239478] [2022-02-15 13:40:02,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:40:02,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:02,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:02,190 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) [2022-02-15 13:40:02,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Waiting until timeout for monitored process [2022-02-15 13:40:02,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:40:02,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:02,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:02,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:02,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:40:02,329 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 21 treesize of output 17 [2022-02-15 13:40:02,330 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 12 treesize of output 8 [2022-02-15 13:40:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:02,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:02,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:02,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-02-15 13:40:02,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:02,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-15 13:40:02,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:02,972 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 28 treesize of output 30 [2022-02-15 13:40:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:03,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333239478] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:03,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:03,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:40:03,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317053474] [2022-02-15 13:40:03,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:03,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:40:03,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:03,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:40:03,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:40:03,008 INFO L87 Difference]: Start difference. First operand 2381 states and 7893 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:03,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:03,285 INFO L93 Difference]: Finished difference Result 2590 states and 8473 transitions. [2022-02-15 13:40:03,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:40:03,285 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:40:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:03,290 INFO L225 Difference]: With dead ends: 2590 [2022-02-15 13:40:03,290 INFO L226 Difference]: Without dead ends: 2532 [2022-02-15 13:40:03,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:40:03,290 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:03,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 219 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 697 Invalid, 0 Unknown, 8 Unchecked, 0.3s Time] [2022-02-15 13:40:03,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2532 states. [2022-02-15 13:40:03,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2532 to 2385. [2022-02-15 13:40:03,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2384 states have (on average 3.317953020134228) internal successors, (7910), 2384 states have internal predecessors, (7910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:03,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 7910 transitions. [2022-02-15 13:40:03,319 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 7910 transitions. Word has length 24 [2022-02-15 13:40:03,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:03,319 INFO L470 AbstractCegarLoop]: Abstraction has 2385 states and 7910 transitions. [2022-02-15 13:40:03,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:03,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 7910 transitions. [2022-02-15 13:40:03,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:03,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:03,322 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:03,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Ended with exit code 0 [2022-02-15 13:40:03,535 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,SelfDestructingSolverStorable455 [2022-02-15 13:40:03,535 INFO L402 AbstractCegarLoop]: === Iteration 457 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1886175015, now seen corresponding path program 441 times [2022-02-15 13:40:03,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:03,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905540079] [2022-02-15 13:40:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:03,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:03,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:03,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:03,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905540079] [2022-02-15 13:40:03,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905540079] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:03,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529066357] [2022-02-15 13:40:03,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:40:03,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:03,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:03,743 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) [2022-02-15 13:40:03,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Waiting until timeout for monitored process [2022-02-15 13:40:03,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:40:03,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:03,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:40:03,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:03,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:40:04,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:04,082 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:40:04,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:04,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 15 treesize of output 7 [2022-02-15 13:40:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:04,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:04,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:04,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-15 13:40:04,888 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:04,888 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 58 treesize of output 56 [2022-02-15 13:40:04,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:04,891 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 48 treesize of output 46 [2022-02-15 13:40:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:04,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529066357] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:04,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:04,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:04,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431221969] [2022-02-15 13:40:04,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:04,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:04,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:04,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:04,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:04,924 INFO L87 Difference]: Start difference. First operand 2385 states and 7910 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:05,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:05,578 INFO L93 Difference]: Finished difference Result 2818 states and 9063 transitions. [2022-02-15 13:40:05,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:40:05,579 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:05,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:05,583 INFO L225 Difference]: With dead ends: 2818 [2022-02-15 13:40:05,583 INFO L226 Difference]: Without dead ends: 2638 [2022-02-15 13:40:05,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:40:05,583 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 136 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:05,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 300 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 823 Invalid, 0 Unknown, 161 Unchecked, 0.3s Time] [2022-02-15 13:40:05,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2022-02-15 13:40:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2385. [2022-02-15 13:40:05,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2384 states have (on average 3.317953020134228) internal successors, (7910), 2384 states have internal predecessors, (7910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:05,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 7910 transitions. [2022-02-15 13:40:05,615 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 7910 transitions. Word has length 24 [2022-02-15 13:40:05,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:05,615 INFO L470 AbstractCegarLoop]: Abstraction has 2385 states and 7910 transitions. [2022-02-15 13:40:05,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:05,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 7910 transitions. [2022-02-15 13:40:05,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:05,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:05,618 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:05,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:05,834 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,SelfDestructingSolverStorable456 [2022-02-15 13:40:05,834 INFO L402 AbstractCegarLoop]: === Iteration 458 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:05,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:05,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1050505639, now seen corresponding path program 442 times [2022-02-15 13:40:05,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:05,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036440576] [2022-02-15 13:40:05,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:05,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:05,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:05,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036440576] [2022-02-15 13:40:05,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036440576] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:05,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520325048] [2022-02-15 13:40:05,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:40:05,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:05,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:05,978 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) [2022-02-15 13:40:05,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Waiting until timeout for monitored process [2022-02-15 13:40:06,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:40:06,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:06,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:40:06,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:06,064 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 41 treesize of output 35 [2022-02-15 13:40:06,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:06,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-02-15 13:40:06,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:06,114 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:40:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:06,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:06,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:06,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-02-15 13:40:06,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:06,824 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 56 treesize of output 54 [2022-02-15 13:40:06,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:06,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 44 [2022-02-15 13:40:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:06,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520325048] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:06,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:06,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:06,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707872595] [2022-02-15 13:40:06,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:06,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:06,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:06,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:06,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:06,859 INFO L87 Difference]: Start difference. First operand 2385 states and 7910 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:09,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:09,000 INFO L93 Difference]: Finished difference Result 3443 states and 10601 transitions. [2022-02-15 13:40:09,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 13:40:09,000 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:09,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:09,005 INFO L225 Difference]: With dead ends: 3443 [2022-02-15 13:40:09,006 INFO L226 Difference]: Without dead ends: 3208 [2022-02-15 13:40:09,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=301, Invalid=1679, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 13:40:09,006 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 288 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:09,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 389 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1185 Invalid, 0 Unknown, 59 Unchecked, 0.5s Time] [2022-02-15 13:40:09,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3208 states. [2022-02-15 13:40:09,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 2385. [2022-02-15 13:40:09,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2384 states have (on average 3.317953020134228) internal successors, (7910), 2384 states have internal predecessors, (7910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:09,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 7910 transitions. [2022-02-15 13:40:09,043 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 7910 transitions. Word has length 24 [2022-02-15 13:40:09,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:09,043 INFO L470 AbstractCegarLoop]: Abstraction has 2385 states and 7910 transitions. [2022-02-15 13:40:09,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:09,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 7910 transitions. [2022-02-15 13:40:09,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:09,046 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:09,046 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:09,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:09,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,443 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:09,262 INFO L402 AbstractCegarLoop]: === Iteration 459 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:09,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:09,262 INFO L85 PathProgramCache]: Analyzing trace with hash 440424529, now seen corresponding path program 443 times [2022-02-15 13:40:09,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:09,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000599010] [2022-02-15 13:40:09,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:09,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:09,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:09,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000599010] [2022-02-15 13:40:09,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000599010] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:09,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231467663] [2022-02-15 13:40:09,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:40:09,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:09,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:09,354 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) [2022-02-15 13:40:09,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Waiting until timeout for monitored process [2022-02-15 13:40:09,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:40:09,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:09,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:09,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:09,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:40:09,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:40:09,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:09,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:09,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:09,864 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 79 treesize of output 70 [2022-02-15 13:40:09,947 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:09,948 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 34 treesize of output 36 [2022-02-15 13:40:09,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:09,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 13:40:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:09,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231467663] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:09,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:09,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:40:09,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881232137] [2022-02-15 13:40:09,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:09,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:40:09,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:09,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:40:09,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:40:09,979 INFO L87 Difference]: Start difference. First operand 2385 states and 7910 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:10,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:10,295 INFO L93 Difference]: Finished difference Result 2544 states and 8329 transitions. [2022-02-15 13:40:10,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 13:40:10,295 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-02-15 13:40:10,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:10,300 INFO L225 Difference]: With dead ends: 2544 [2022-02-15 13:40:10,300 INFO L226 Difference]: Without dead ends: 2461 [2022-02-15 13:40:10,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:40:10,300 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 70 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:10,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 180 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:40:10,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2022-02-15 13:40:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 2380. [2022-02-15 13:40:10,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2380 states, 2379 states have (on average 3.32072299285414) internal successors, (7900), 2379 states have internal predecessors, (7900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:10,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2380 states to 2380 states and 7900 transitions. [2022-02-15 13:40:10,328 INFO L78 Accepts]: Start accepts. Automaton has 2380 states and 7900 transitions. Word has length 24 [2022-02-15 13:40:10,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:10,328 INFO L470 AbstractCegarLoop]: Abstraction has 2380 states and 7900 transitions. [2022-02-15 13:40:10,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:10,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2380 states and 7900 transitions. [2022-02-15 13:40:10,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:10,331 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:10,331 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:10,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:10,546 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,SelfDestructingSolverStorable458 [2022-02-15 13:40:10,547 INFO L402 AbstractCegarLoop]: === Iteration 460 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:10,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:10,547 INFO L85 PathProgramCache]: Analyzing trace with hash 282339253, now seen corresponding path program 444 times [2022-02-15 13:40:10,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:10,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659524388] [2022-02-15 13:40:10,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:10,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:10,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:10,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:10,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659524388] [2022-02-15 13:40:10,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659524388] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:10,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546415720] [2022-02-15 13:40:10,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:40:10,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:10,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:10,739 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) [2022-02-15 13:40:10,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Waiting until timeout for monitored process [2022-02-15 13:40:10,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:40:10,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:10,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:10,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:10,829 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 23 treesize of output 19 [2022-02-15 13:40:10,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:10,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:40:10,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:10,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:40:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:10,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:11,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:11,232 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 141 treesize of output 121 [2022-02-15 13:40:11,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:11,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-15 13:40:11,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:11,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 13:40:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:11,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546415720] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:11,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:11,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:11,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997401299] [2022-02-15 13:40:11,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:11,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:11,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:11,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:11,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:11,385 INFO L87 Difference]: Start difference. First operand 2380 states and 7900 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:11,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:11,612 INFO L93 Difference]: Finished difference Result 2493 states and 8211 transitions. [2022-02-15 13:40:11,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:40:11,612 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:11,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:11,617 INFO L225 Difference]: With dead ends: 2493 [2022-02-15 13:40:11,617 INFO L226 Difference]: Without dead ends: 2462 [2022-02-15 13:40:11,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:40:11,617 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:11,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 184 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 705 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-02-15 13:40:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2022-02-15 13:40:11,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 2379. [2022-02-15 13:40:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2379 states, 2378 states have (on average 3.3208578637510513) internal successors, (7897), 2378 states have internal predecessors, (7897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2379 states to 2379 states and 7897 transitions. [2022-02-15 13:40:11,649 INFO L78 Accepts]: Start accepts. Automaton has 2379 states and 7897 transitions. Word has length 24 [2022-02-15 13:40:11,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:11,649 INFO L470 AbstractCegarLoop]: Abstraction has 2379 states and 7897 transitions. [2022-02-15 13:40:11,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:11,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2379 states and 7897 transitions. [2022-02-15 13:40:11,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:11,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:11,652 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:11,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:11,868 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,SelfDestructingSolverStorable459 [2022-02-15 13:40:11,868 INFO L402 AbstractCegarLoop]: === Iteration 461 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:11,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:11,869 INFO L85 PathProgramCache]: Analyzing trace with hash -49337433, now seen corresponding path program 445 times [2022-02-15 13:40:11,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:11,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87257380] [2022-02-15 13:40:11,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:11,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:40:11,984 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:11,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87257380] [2022-02-15 13:40:11,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87257380] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:11,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610804906] [2022-02-15 13:40:11,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:40:11,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:11,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:11,985 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) [2022-02-15 13:40:11,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Waiting until timeout for monitored process [2022-02-15 13:40:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:12,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:12,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:12,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:12,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:40:12,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:12,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:40:12,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:12,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:40:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:40:12,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:12,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:12,603 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 141 treesize of output 121 [2022-02-15 13:40:12,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:12,757 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 34 treesize of output 36 [2022-02-15 13:40:12,759 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:12,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 13:40:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-15 13:40:12,788 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610804906] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:12,788 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:12,788 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-02-15 13:40:12,788 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095161125] [2022-02-15 13:40:12,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:12,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 13:40:12,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:12,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 13:40:12,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:40:12,788 INFO L87 Difference]: Start difference. First operand 2379 states and 7897 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2022-02-15 13:40:12,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:12,939 INFO L93 Difference]: Finished difference Result 2484 states and 8179 transitions. [2022-02-15 13:40:12,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:40:12,940 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 24 [2022-02-15 13:40:12,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:12,944 INFO L225 Difference]: With dead ends: 2484 [2022-02-15 13:40:12,944 INFO L226 Difference]: Without dead ends: 2469 [2022-02-15 13:40:12,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:40:12,944 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:12,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 140 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 449 Invalid, 0 Unknown, 90 Unchecked, 0.1s Time] [2022-02-15 13:40:12,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2022-02-15 13:40:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2376. [2022-02-15 13:40:12,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2375 states have (on average 3.320842105263158) internal successors, (7887), 2375 states have internal predecessors, (7887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:12,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 7887 transitions. [2022-02-15 13:40:12,972 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 7887 transitions. Word has length 24 [2022-02-15 13:40:12,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:12,972 INFO L470 AbstractCegarLoop]: Abstraction has 2376 states and 7887 transitions. [2022-02-15 13:40:12,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) [2022-02-15 13:40:12,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 7887 transitions. [2022-02-15 13:40:12,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:12,975 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:12,975 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:12,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:13,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,446 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:13,188 INFO L402 AbstractCegarLoop]: === Iteration 462 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:13,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:13,188 INFO L85 PathProgramCache]: Analyzing trace with hash 665814237, now seen corresponding path program 446 times [2022-02-15 13:40:13,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:13,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896995153] [2022-02-15 13:40:13,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:13,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:13,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:13,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896995153] [2022-02-15 13:40:13,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896995153] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:13,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181060286] [2022-02-15 13:40:13,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:40:13,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:13,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:13,298 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) [2022-02-15 13:40:13,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Waiting until timeout for monitored process [2022-02-15 13:40:13,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:40:13,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:13,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:13,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:13,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:13,437 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:40:13,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:13,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:40:13,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:13,474 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:40:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:13,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:13,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:13,807 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 143 treesize of output 123 [2022-02-15 13:40:13,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:13,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-02-15 13:40:13,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:13,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-02-15 13:40:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:14,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181060286] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:14,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:14,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:14,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578344795] [2022-02-15 13:40:14,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:14,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:14,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:14,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:14,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:14,026 INFO L87 Difference]: Start difference. First operand 2376 states and 7887 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:14,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:14,282 INFO L93 Difference]: Finished difference Result 2548 states and 8370 transitions. [2022-02-15 13:40:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:40:14,283 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:14,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:14,287 INFO L225 Difference]: With dead ends: 2548 [2022-02-15 13:40:14,287 INFO L226 Difference]: Without dead ends: 2472 [2022-02-15 13:40:14,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-02-15 13:40:14,287 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 101 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:14,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 183 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 575 Invalid, 0 Unknown, 247 Unchecked, 0.2s Time] [2022-02-15 13:40:14,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2472 states. [2022-02-15 13:40:14,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2472 to 2383. [2022-02-15 13:40:14,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2383 states, 2382 states have (on average 3.3228379513014272) internal successors, (7915), 2382 states have internal predecessors, (7915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:14,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2383 states to 2383 states and 7915 transitions. [2022-02-15 13:40:14,316 INFO L78 Accepts]: Start accepts. Automaton has 2383 states and 7915 transitions. Word has length 24 [2022-02-15 13:40:14,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:14,316 INFO L470 AbstractCegarLoop]: Abstraction has 2383 states and 7915 transitions. [2022-02-15 13:40:14,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:14,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2383 states and 7915 transitions. [2022-02-15 13:40:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:14,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:14,319 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:14,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:14,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,447 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:14,534 INFO L402 AbstractCegarLoop]: === Iteration 463 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:14,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:14,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1252729839, now seen corresponding path program 447 times [2022-02-15 13:40:14,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:14,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980027012] [2022-02-15 13:40:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:14,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:14,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:14,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980027012] [2022-02-15 13:40:14,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980027012] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:14,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004633653] [2022-02-15 13:40:14,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:40:14,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:14,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:14,627 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) [2022-02-15 13:40:14,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Waiting until timeout for monitored process [2022-02-15 13:40:14,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:40:14,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:14,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:14,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:14,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-02-15 13:40:14,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-02-15 13:40:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:14,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:15,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:15,003 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 80 treesize of output 71 [2022-02-15 13:40:15,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:15,096 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 34 treesize of output 36 [2022-02-15 13:40:15,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:15,098 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 28 treesize of output 30 [2022-02-15 13:40:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:15,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004633653] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:15,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:15,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-02-15 13:40:15,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686685708] [2022-02-15 13:40:15,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:15,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 13:40:15,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:15,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 13:40:15,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-02-15 13:40:15,127 INFO L87 Difference]: Start difference. First operand 2383 states and 7915 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) [2022-02-15 13:40:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:15,314 INFO L93 Difference]: Finished difference Result 2482 states and 8169 transitions. [2022-02-15 13:40:15,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:40:15,314 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 24 [2022-02-15 13:40:15,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:15,318 INFO L225 Difference]: With dead ends: 2482 [2022-02-15 13:40:15,318 INFO L226 Difference]: Without dead ends: 2451 [2022-02-15 13:40:15,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-02-15 13:40:15,319 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:15,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 146 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 13:40:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2022-02-15 13:40:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2376. [2022-02-15 13:40:15,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2375 states have (on average 3.320842105263158) internal successors, (7887), 2375 states have internal predecessors, (7887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:15,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 7887 transitions. [2022-02-15 13:40:15,348 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 7887 transitions. Word has length 24 [2022-02-15 13:40:15,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:15,348 INFO L470 AbstractCegarLoop]: Abstraction has 2376 states and 7887 transitions. [2022-02-15 13:40:15,348 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) [2022-02-15 13:40:15,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 7887 transitions. [2022-02-15 13:40:15,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:15,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:15,351 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:15,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:15,567 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,SelfDestructingSolverStorable462 [2022-02-15 13:40:15,567 INFO L402 AbstractCegarLoop]: === Iteration 464 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:15,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:15,567 INFO L85 PathProgramCache]: Analyzing trace with hash 84053457, now seen corresponding path program 448 times [2022-02-15 13:40:15,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:15,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179189323] [2022-02-15 13:40:15,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:15,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:15,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:15,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179189323] [2022-02-15 13:40:15,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179189323] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:15,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210755314] [2022-02-15 13:40:15,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:40:15,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:15,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:15,697 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) [2022-02-15 13:40:15,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Waiting until timeout for monitored process [2022-02-15 13:40:15,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:40:15,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:15,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:40:15,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:15,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:15,781 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:40:15,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:15,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:40:15,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:15,833 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:40:15,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:15,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:16,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:16,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-02-15 13:40:16,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:16,526 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 56 treesize of output 54 [2022-02-15 13:40:16,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:16,529 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 46 treesize of output 44 [2022-02-15 13:40:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:16,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210755314] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:16,562 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:16,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:40:16,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379792621] [2022-02-15 13:40:16,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:16,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:40:16,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:16,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:40:16,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:40:16,563 INFO L87 Difference]: Start difference. First operand 2376 states and 7887 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) [2022-02-15 13:40:17,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:17,791 INFO L93 Difference]: Finished difference Result 3039 states and 9554 transitions. [2022-02-15 13:40:17,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 13:40:17,791 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 24 [2022-02-15 13:40:17,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:17,796 INFO L225 Difference]: With dead ends: 3039 [2022-02-15 13:40:17,796 INFO L226 Difference]: Without dead ends: 2835 [2022-02-15 13:40:17,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 13:40:17,797 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 254 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:17,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 399 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1040 Invalid, 0 Unknown, 129 Unchecked, 0.3s Time] [2022-02-15 13:40:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2022-02-15 13:40:17,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2377. [2022-02-15 13:40:17,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2376 states have (on average 3.321127946127946) internal successors, (7891), 2376 states have internal predecessors, (7891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:17,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 7891 transitions. [2022-02-15 13:40:17,830 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 7891 transitions. Word has length 24 [2022-02-15 13:40:17,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:17,830 INFO L470 AbstractCegarLoop]: Abstraction has 2377 states and 7891 transitions. [2022-02-15 13:40:17,830 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) [2022-02-15 13:40:17,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 7891 transitions. [2022-02-15 13:40:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:17,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:17,833 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:17,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Ended with exit code 0 [2022-02-15 13:40:18,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 449 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2022-02-15 13:40:18,049 INFO L402 AbstractCegarLoop]: === Iteration 465 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:18,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:18,049 INFO L85 PathProgramCache]: Analyzing trace with hash -31467257, now seen corresponding path program 449 times [2022-02-15 13:40:18,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:18,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770153226] [2022-02-15 13:40:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:18,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:18,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:18,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770153226] [2022-02-15 13:40:18,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770153226] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:18,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180508062] [2022-02-15 13:40:18,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:40:18,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:18,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:18,182 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) [2022-02-15 13:40:18,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Waiting until timeout for monitored process [2022-02-15 13:40:18,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:40:18,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:18,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:18,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:18,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:18,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:40:18,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:18,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:40:18,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:18,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:40:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:18,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:18,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:18,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-02-15 13:40:18,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:18,843 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 34 treesize of output 36 [2022-02-15 13:40:18,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:18,845 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 28 treesize of output 30 [2022-02-15 13:40:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:18,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180508062] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:18,875 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:18,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:40:18,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006391839] [2022-02-15 13:40:18,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:18,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:40:18,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:18,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:40:18,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:40:18,875 INFO L87 Difference]: Start difference. First operand 2377 states and 7891 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) [2022-02-15 13:40:19,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:19,404 INFO L93 Difference]: Finished difference Result 2562 states and 8433 transitions. [2022-02-15 13:40:19,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:40:19,405 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 24 [2022-02-15 13:40:19,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:19,409 INFO L225 Difference]: With dead ends: 2562 [2022-02-15 13:40:19,409 INFO L226 Difference]: Without dead ends: 2489 [2022-02-15 13:40:19,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:40:19,409 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 78 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:19,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 188 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 724 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2022-02-15 13:40:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2022-02-15 13:40:19,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 2384. [2022-02-15 13:40:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 3.3231221149811163) internal successors, (7919), 2383 states have internal predecessors, (7919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:19,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 7919 transitions. [2022-02-15 13:40:19,438 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 7919 transitions. Word has length 24 [2022-02-15 13:40:19,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:19,438 INFO L470 AbstractCegarLoop]: Abstraction has 2384 states and 7919 transitions. [2022-02-15 13:40:19,438 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) [2022-02-15 13:40:19,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 7919 transitions. [2022-02-15 13:40:19,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:19,441 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:19,441 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:19,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:19,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 450 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2022-02-15 13:40:19,648 INFO L402 AbstractCegarLoop]: === Iteration 466 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:19,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:19,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1580031431, now seen corresponding path program 450 times [2022-02-15 13:40:19,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:19,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103105359] [2022-02-15 13:40:19,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:19,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:19,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:19,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103105359] [2022-02-15 13:40:19,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103105359] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:19,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818480698] [2022-02-15 13:40:19,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:40:19,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:19,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:19,831 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) [2022-02-15 13:40:19,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Waiting until timeout for monitored process [2022-02-15 13:40:19,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:40:19,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:19,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:40:19,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:19,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:19,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:40:20,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:20,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:40:20,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:20,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-02-15 13:40:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:20,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:20,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:20,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-02-15 13:40:20,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:20,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-02-15 13:40:20,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:20,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-02-15 13:40:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:20,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818480698] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:20,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:20,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:40:20,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901693067] [2022-02-15 13:40:20,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:20,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:40:20,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:20,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:40:20,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:40:20,937 INFO L87 Difference]: Start difference. First operand 2384 states and 7919 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-02-15 13:40:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:21,191 INFO L93 Difference]: Finished difference Result 2503 states and 8223 transitions. [2022-02-15 13:40:21,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:40:21,191 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 24 [2022-02-15 13:40:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:21,196 INFO L225 Difference]: With dead ends: 2503 [2022-02-15 13:40:21,196 INFO L226 Difference]: Without dead ends: 2442 [2022-02-15 13:40:21,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:21,196 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:21,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 179 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 436 Invalid, 0 Unknown, 275 Unchecked, 0.2s Time] [2022-02-15 13:40:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2022-02-15 13:40:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2378. [2022-02-15 13:40:21,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 3.3209928481278923) internal successors, (7894), 2377 states have internal predecessors, (7894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 7894 transitions. [2022-02-15 13:40:21,226 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 7894 transitions. Word has length 24 [2022-02-15 13:40:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:21,226 INFO L470 AbstractCegarLoop]: Abstraction has 2378 states and 7894 transitions. [2022-02-15 13:40:21,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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) [2022-02-15 13:40:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 7894 transitions. [2022-02-15 13:40:21,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:21,229 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:21,229 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:21,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Ended with exit code 0 [2022-02-15 13:40:21,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2022-02-15 13:40:21,443 INFO L402 AbstractCegarLoop]: === Iteration 467 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:21,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:21,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2064434201, now seen corresponding path program 451 times [2022-02-15 13:40:21,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:21,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461203565] [2022-02-15 13:40:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:21,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:21,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:21,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461203565] [2022-02-15 13:40:21,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461203565] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:21,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986406129] [2022-02-15 13:40:21,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:40:21,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:21,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:21,607 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) [2022-02-15 13:40:21,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Waiting until timeout for monitored process [2022-02-15 13:40:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:21,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:21,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:21,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:21,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:40:21,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:21,805 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:40:21,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:21,807 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:40:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:21,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:22,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:22,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:40:22,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:22,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-15 13:40:22,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:22,652 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 30 treesize of output 32 [2022-02-15 13:40:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:22,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986406129] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:22,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:22,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:22,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160422454] [2022-02-15 13:40:22,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:22,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:22,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:22,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:22,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:22,726 INFO L87 Difference]: Start difference. First operand 2378 states and 7894 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:23,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:23,137 INFO L93 Difference]: Finished difference Result 2499 states and 8211 transitions. [2022-02-15 13:40:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:40:23,137 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:23,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:23,141 INFO L225 Difference]: With dead ends: 2499 [2022-02-15 13:40:23,141 INFO L226 Difference]: Without dead ends: 2464 [2022-02-15 13:40:23,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:40:23,142 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:23,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 240 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 765 Invalid, 0 Unknown, 201 Unchecked, 0.3s Time] [2022-02-15 13:40:23,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2464 states. [2022-02-15 13:40:23,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2464 to 2378. [2022-02-15 13:40:23,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 3.3209928481278923) internal successors, (7894), 2377 states have internal predecessors, (7894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:23,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 7894 transitions. [2022-02-15 13:40:23,171 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 7894 transitions. Word has length 24 [2022-02-15 13:40:23,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:23,171 INFO L470 AbstractCegarLoop]: Abstraction has 2378 states and 7894 transitions. [2022-02-15 13:40:23,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:23,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 7894 transitions. [2022-02-15 13:40:23,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:23,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:23,173 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:23,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Ended with exit code 0 [2022-02-15 13:40:23,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2022-02-15 13:40:23,384 INFO L402 AbstractCegarLoop]: === Iteration 468 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:23,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:23,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1375424015, now seen corresponding path program 452 times [2022-02-15 13:40:23,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:23,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325121497] [2022-02-15 13:40:23,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:23,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:23,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:23,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325121497] [2022-02-15 13:40:23,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325121497] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:23,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002538012] [2022-02-15 13:40:23,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:40:23,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:23,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:23,575 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) [2022-02-15 13:40:23,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Waiting until timeout for monitored process [2022-02-15 13:40:23,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:40:23,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:23,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:23,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:23,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:23,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:40:23,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:23,833 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-02-15 13:40:23,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:23,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 12 treesize of output 3 [2022-02-15 13:40:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:23,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:24,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:24,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-02-15 13:40:24,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:24,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-02-15 13:40:24,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:24,539 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 30 treesize of output 32 [2022-02-15 13:40:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:24,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002538012] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:24,588 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:24,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:24,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881821925] [2022-02-15 13:40:24,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:24,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:24,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:24,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:24,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:24,589 INFO L87 Difference]: Start difference. First operand 2378 states and 7894 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:25,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:25,041 INFO L93 Difference]: Finished difference Result 2545 states and 8333 transitions. [2022-02-15 13:40:25,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:40:25,042 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:25,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:25,046 INFO L225 Difference]: With dead ends: 2545 [2022-02-15 13:40:25,046 INFO L226 Difference]: Without dead ends: 2487 [2022-02-15 13:40:25,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:40:25,046 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 68 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:25,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 189 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 598 Invalid, 0 Unknown, 115 Unchecked, 0.2s Time] [2022-02-15 13:40:25,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2022-02-15 13:40:25,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 2378. [2022-02-15 13:40:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 3.3209928481278923) internal successors, (7894), 2377 states have internal predecessors, (7894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:25,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 7894 transitions. [2022-02-15 13:40:25,077 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 7894 transitions. Word has length 24 [2022-02-15 13:40:25,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:25,077 INFO L470 AbstractCegarLoop]: Abstraction has 2378 states and 7894 transitions. [2022-02-15 13:40:25,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:25,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 7894 transitions. [2022-02-15 13:40:25,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:25,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:25,081 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:25,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:25,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,453 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:25,300 INFO L402 AbstractCegarLoop]: === Iteration 469 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:25,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:25,300 INFO L85 PathProgramCache]: Analyzing trace with hash 503219933, now seen corresponding path program 453 times [2022-02-15 13:40:25,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:25,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889461260] [2022-02-15 13:40:25,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:25,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:25,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:25,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:25,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889461260] [2022-02-15 13:40:25,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889461260] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:25,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601692202] [2022-02-15 13:40:25,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:40:25,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:25,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:25,483 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) [2022-02-15 13:40:25,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Waiting until timeout for monitored process [2022-02-15 13:40:25,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:40:25,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:25,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:25,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:25,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:25,583 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:40:25,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:25,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 [2022-02-15 13:40:25,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:25,745 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2022-02-15 13:40:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:25,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:26,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:26,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 120 [2022-02-15 13:40:26,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:26,309 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 77 treesize of output 70 [2022-02-15 13:40:26,313 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:26,313 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 61 treesize of output 54 [2022-02-15 13:40:26,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:26,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601692202] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:26,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:26,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:40:26,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562649133] [2022-02-15 13:40:26,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:26,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:40:26,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:26,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:40:26,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:40:26,408 INFO L87 Difference]: Start difference. First operand 2378 states and 7894 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) [2022-02-15 13:40:26,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:26,912 INFO L93 Difference]: Finished difference Result 2575 states and 8408 transitions. [2022-02-15 13:40:26,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 13:40:26,912 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 24 [2022-02-15 13:40:26,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:26,917 INFO L225 Difference]: With dead ends: 2575 [2022-02-15 13:40:26,917 INFO L226 Difference]: Without dead ends: 2473 [2022-02-15 13:40:26,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:40:26,917 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:26,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 253 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 634 Invalid, 0 Unknown, 172 Unchecked, 0.2s Time] [2022-02-15 13:40:26,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2022-02-15 13:40:26,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 2384. [2022-02-15 13:40:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 3.3206042803189257) internal successors, (7913), 2383 states have internal predecessors, (7913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:26,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 7913 transitions. [2022-02-15 13:40:26,945 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 7913 transitions. Word has length 24 [2022-02-15 13:40:26,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:26,945 INFO L470 AbstractCegarLoop]: Abstraction has 2384 states and 7913 transitions. [2022-02-15 13:40:26,945 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) [2022-02-15 13:40:26,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 7913 transitions. [2022-02-15 13:40:26,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:26,948 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:26,948 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:26,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:27,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,454 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:27,163 INFO L402 AbstractCegarLoop]: === Iteration 470 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:27,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:27,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1509844803, now seen corresponding path program 454 times [2022-02-15 13:40:27,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:27,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98742764] [2022-02-15 13:40:27,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:27,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:27,345 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:27,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98742764] [2022-02-15 13:40:27,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98742764] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:27,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73926687] [2022-02-15 13:40:27,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:40:27,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:27,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:27,346 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) [2022-02-15 13:40:27,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Waiting until timeout for monitored process [2022-02-15 13:40:27,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:40:27,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:27,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:40:27,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:27,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:27,471 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:40:27,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:27,682 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-02-15 13:40:27,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:27,685 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 53 treesize of output 33 [2022-02-15 13:40:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:27,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:28,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:28,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 123 [2022-02-15 13:40:28,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:28,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 102 [2022-02-15 13:40:28,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:28,357 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 94 treesize of output 82 [2022-02-15 13:40:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:28,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73926687] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:28,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:28,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:28,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521067049] [2022-02-15 13:40:28,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:28,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:28,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:28,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:28,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:28,433 INFO L87 Difference]: Start difference. First operand 2384 states and 7913 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:28,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:28,710 INFO L93 Difference]: Finished difference Result 2567 states and 8390 transitions. [2022-02-15 13:40:28,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:40:28,710 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:28,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:28,714 INFO L225 Difference]: With dead ends: 2567 [2022-02-15 13:40:28,714 INFO L226 Difference]: Without dead ends: 2489 [2022-02-15 13:40:28,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:40:28,714 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:28,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 400 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 563 Invalid, 0 Unknown, 250 Unchecked, 0.2s Time] [2022-02-15 13:40:28,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2489 states. [2022-02-15 13:40:28,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2489 to 2386. [2022-02-15 13:40:28,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2386 states, 2385 states have (on average 3.321593291404612) internal successors, (7922), 2385 states have internal predecessors, (7922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 7922 transitions. [2022-02-15 13:40:28,743 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 7922 transitions. Word has length 24 [2022-02-15 13:40:28,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:28,743 INFO L470 AbstractCegarLoop]: Abstraction has 2386 states and 7922 transitions. [2022-02-15 13:40:28,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:28,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 7922 transitions. [2022-02-15 13:40:28,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:28,746 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:28,746 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:28,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:28,959 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,SelfDestructingSolverStorable469 [2022-02-15 13:40:28,959 INFO L402 AbstractCegarLoop]: === Iteration 471 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:28,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:28,959 INFO L85 PathProgramCache]: Analyzing trace with hash 811770777, now seen corresponding path program 455 times [2022-02-15 13:40:28,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:28,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805998176] [2022-02-15 13:40:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:28,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:29,223 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:29,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:29,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805998176] [2022-02-15 13:40:29,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805998176] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:29,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620957070] [2022-02-15 13:40:29,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:40:29,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:29,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:29,225 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) [2022-02-15 13:40:29,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Waiting until timeout for monitored process [2022-02-15 13:40:29,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-15 13:40:29,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:29,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:29,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:29,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:29,314 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:40:29,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:29,362 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 13:40:29,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:29,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:40:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:29,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:29,983 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:29,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 120 [2022-02-15 13:40:30,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:30,157 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 85 treesize of output 76 [2022-02-15 13:40:30,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:30,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 58 [2022-02-15 13:40:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:30,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620957070] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:30,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:30,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:30,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118346479] [2022-02-15 13:40:30,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:30,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:30,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:30,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:30,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:30,250 INFO L87 Difference]: Start difference. First operand 2386 states and 7922 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:31,024 INFO L93 Difference]: Finished difference Result 2604 states and 8477 transitions. [2022-02-15 13:40:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:40:31,025 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:31,029 INFO L225 Difference]: With dead ends: 2604 [2022-02-15 13:40:31,029 INFO L226 Difference]: Without dead ends: 2484 [2022-02-15 13:40:31,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:40:31,029 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 113 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:31,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 217 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 650 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-02-15 13:40:31,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2022-02-15 13:40:31,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2384. [2022-02-15 13:40:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 3.3222828367603863) internal successors, (7917), 2383 states have internal predecessors, (7917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 7917 transitions. [2022-02-15 13:40:31,058 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 7917 transitions. Word has length 24 [2022-02-15 13:40:31,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:31,058 INFO L470 AbstractCegarLoop]: Abstraction has 2384 states and 7917 transitions. [2022-02-15 13:40:31,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 7917 transitions. [2022-02-15 13:40:31,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:31,061 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:31,061 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:31,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Ended with exit code 0 [2022-02-15 13:40:31,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,456 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:31,277 INFO L402 AbstractCegarLoop]: === Iteration 472 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:31,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:31,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1221196167, now seen corresponding path program 456 times [2022-02-15 13:40:31,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:31,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092249602] [2022-02-15 13:40:31,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:31,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:31,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:31,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092249602] [2022-02-15 13:40:31,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092249602] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:31,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874619929] [2022-02-15 13:40:31,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:40:31,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:31,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:31,472 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) [2022-02-15 13:40:31,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Waiting until timeout for monitored process [2022-02-15 13:40:31,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-15 13:40:31,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:31,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:40:31,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:31,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:31,565 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:40:31,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:31,682 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 53 [2022-02-15 13:40:31,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:31,684 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-02-15 13:40:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:31,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:32,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:32,060 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 133 treesize of output 123 [2022-02-15 13:40:32,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:32,256 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 113 treesize of output 99 [2022-02-15 13:40:32,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:32,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 77 [2022-02-15 13:40:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:32,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874619929] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:32,307 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:32,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:32,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326345532] [2022-02-15 13:40:32,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:32,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:32,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:32,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:32,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:32,307 INFO L87 Difference]: Start difference. First operand 2384 states and 7917 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:32,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:32,544 INFO L93 Difference]: Finished difference Result 2563 states and 8363 transitions. [2022-02-15 13:40:32,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:40:32,544 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:32,548 INFO L225 Difference]: With dead ends: 2563 [2022-02-15 13:40:32,548 INFO L226 Difference]: Without dead ends: 2485 [2022-02-15 13:40:32,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:40:32,549 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:32,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 297 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 600 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-02-15 13:40:32,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2485 states. [2022-02-15 13:40:32,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2485 to 2386. [2022-02-15 13:40:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2386 states, 2385 states have (on average 3.321593291404612) internal successors, (7922), 2385 states have internal predecessors, (7922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 7922 transitions. [2022-02-15 13:40:32,576 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 7922 transitions. Word has length 24 [2022-02-15 13:40:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:32,576 INFO L470 AbstractCegarLoop]: Abstraction has 2386 states and 7922 transitions. [2022-02-15 13:40:32,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 7922 transitions. [2022-02-15 13:40:32,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:32,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:32,579 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:32,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:32,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,457 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:32,793 INFO L402 AbstractCegarLoop]: === Iteration 473 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:32,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:32,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1975345725, now seen corresponding path program 457 times [2022-02-15 13:40:32,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:32,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981132336] [2022-02-15 13:40:32,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:32,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:32,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:32,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:32,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981132336] [2022-02-15 13:40:32,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981132336] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:32,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594725795] [2022-02-15 13:40:32,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:40:32,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:32,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:32,967 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) [2022-02-15 13:40:32,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Waiting until timeout for monitored process [2022-02-15 13:40:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:32,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:40:32,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:33,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:33,053 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-02-15 13:40:33,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:33,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 [2022-02-15 13:40:33,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:33,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-02-15 13:40:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:33,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:33,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:33,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 123 [2022-02-15 13:40:33,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:33,757 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 112 treesize of output 98 [2022-02-15 13:40:33,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:33,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 76 [2022-02-15 13:40:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:33,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594725795] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:33,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:33,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:33,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89779876] [2022-02-15 13:40:33,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:33,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:33,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:33,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:33,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:33,815 INFO L87 Difference]: Start difference. First operand 2386 states and 7922 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:34,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:34,040 INFO L93 Difference]: Finished difference Result 2533 states and 8273 transitions. [2022-02-15 13:40:34,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 13:40:34,040 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:34,044 INFO L225 Difference]: With dead ends: 2533 [2022-02-15 13:40:34,044 INFO L226 Difference]: Without dead ends: 2463 [2022-02-15 13:40:34,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-02-15 13:40:34,044 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:34,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 323 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 520 Invalid, 0 Unknown, 185 Unchecked, 0.2s Time] [2022-02-15 13:40:34,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2022-02-15 13:40:34,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 2388. [2022-02-15 13:40:34,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 3.3209049015500627) internal successors, (7927), 2387 states have internal predecessors, (7927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:34,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 7927 transitions. [2022-02-15 13:40:34,069 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 7927 transitions. Word has length 24 [2022-02-15 13:40:34,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:34,069 INFO L470 AbstractCegarLoop]: Abstraction has 2388 states and 7927 transitions. [2022-02-15 13:40:34,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:34,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 7927 transitions. [2022-02-15 13:40:34,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:34,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:34,072 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:34,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Ended with exit code 0 [2022-02-15 13:40:34,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,458 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:34,288 INFO L402 AbstractCegarLoop]: === Iteration 474 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:34,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:34,288 INFO L85 PathProgramCache]: Analyzing trace with hash -692486663, now seen corresponding path program 458 times [2022-02-15 13:40:34,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:34,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912973834] [2022-02-15 13:40:34,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:34,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:34,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:34,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912973834] [2022-02-15 13:40:34,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912973834] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:34,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561255196] [2022-02-15 13:40:34,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:40:34,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:34,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:34,546 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) [2022-02-15 13:40:34,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Waiting until timeout for monitored process [2022-02-15 13:40:34,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:40:34,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:34,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:34,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:34,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:34,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 19 [2022-02-15 13:40:34,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:34,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 43 [2022-02-15 13:40:34,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:34,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-02-15 13:40:34,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:34,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:35,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:35,096 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 100 treesize of output 94 [2022-02-15 13:40:35,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:35,232 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 144 treesize of output 124 [2022-02-15 13:40:35,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:35,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 96 [2022-02-15 13:40:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:35,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561255196] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:35,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:35,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:35,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771732215] [2022-02-15 13:40:35,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:35,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:35,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:35,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:35,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:35,339 INFO L87 Difference]: Start difference. First operand 2388 states and 7927 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:35,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:35,788 INFO L93 Difference]: Finished difference Result 2564 states and 8362 transitions. [2022-02-15 13:40:35,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 13:40:35,788 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:35,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:35,792 INFO L225 Difference]: With dead ends: 2564 [2022-02-15 13:40:35,793 INFO L226 Difference]: Without dead ends: 2495 [2022-02-15 13:40:35,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 13:40:35,793 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:35,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 280 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 592 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2022-02-15 13:40:35,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2022-02-15 13:40:35,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2387. [2022-02-15 13:40:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 3.3202011735121544) internal successors, (7922), 2386 states have internal predecessors, (7922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:35,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 7922 transitions. [2022-02-15 13:40:35,820 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 7922 transitions. Word has length 24 [2022-02-15 13:40:35,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:35,820 INFO L470 AbstractCegarLoop]: Abstraction has 2387 states and 7922 transitions. [2022-02-15 13:40:35,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:35,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 7922 transitions. [2022-02-15 13:40:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:35,823 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:35,823 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:35,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:36,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,459 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:36,038 INFO L402 AbstractCegarLoop]: === Iteration 475 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:36,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1217045095, now seen corresponding path program 459 times [2022-02-15 13:40:36,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:36,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332189658] [2022-02-15 13:40:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:36,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:36,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:36,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332189658] [2022-02-15 13:40:36,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332189658] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:36,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893250804] [2022-02-15 13:40:36,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:40:36,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:36,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:36,246 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) [2022-02-15 13:40:36,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Waiting until timeout for monitored process [2022-02-15 13:40:36,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-15 13:40:36,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:36,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:36,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:36,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:36,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:40:36,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:36,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:40:36,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:36,437 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:40:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:36,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:37,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:37,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2022-02-15 13:40:37,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:37,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 126 [2022-02-15 13:40:37,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:37,177 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 118 treesize of output 98 [2022-02-15 13:40:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:37,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893250804] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:37,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:37,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:37,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837634820] [2022-02-15 13:40:37,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:37,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:37,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:37,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:37,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:37,293 INFO L87 Difference]: Start difference. First operand 2387 states and 7922 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:37,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:37,590 INFO L93 Difference]: Finished difference Result 2543 states and 8343 transitions. [2022-02-15 13:40:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 13:40:37,590 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:37,594 INFO L225 Difference]: With dead ends: 2543 [2022-02-15 13:40:37,594 INFO L226 Difference]: Without dead ends: 2477 [2022-02-15 13:40:37,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:40:37,594 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 87 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:37,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 195 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 696 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-02-15 13:40:37,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2477 states. [2022-02-15 13:40:37,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2477 to 2388. [2022-02-15 13:40:37,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 3.320485965647256) internal successors, (7926), 2387 states have internal predecessors, (7926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:37,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 7926 transitions. [2022-02-15 13:40:37,624 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 7926 transitions. Word has length 24 [2022-02-15 13:40:37,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:37,624 INFO L470 AbstractCegarLoop]: Abstraction has 2388 states and 7926 transitions. [2022-02-15 13:40:37,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:37,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 7926 transitions. [2022-02-15 13:40:37,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:37,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:37,627 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:37,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:37,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 460 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2022-02-15 13:40:37,842 INFO L402 AbstractCegarLoop]: === Iteration 476 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:37,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1101524381, now seen corresponding path program 460 times [2022-02-15 13:40:37,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:37,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406866256] [2022-02-15 13:40:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:37,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:37,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:37,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406866256] [2022-02-15 13:40:37,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406866256] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:37,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627457430] [2022-02-15 13:40:37,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:40:37,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:37,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:37,988 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) [2022-02-15 13:40:37,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Waiting until timeout for monitored process [2022-02-15 13:40:38,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:40:38,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:38,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:40:38,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:38,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:38,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:40:38,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:38,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:40:38,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:38,199 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:40:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:38,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:38,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:38,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 67 [2022-02-15 13:40:39,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:39,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 93 [2022-02-15 13:40:39,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:39,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 73 [2022-02-15 13:40:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:39,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627457430] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:39,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:39,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-15 13:40:39,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781332757] [2022-02-15 13:40:39,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:39,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 13:40:39,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:39,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 13:40:39,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-02-15 13:40:39,190 INFO L87 Difference]: Start difference. First operand 2388 states and 7926 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) [2022-02-15 13:40:40,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:40,311 INFO L93 Difference]: Finished difference Result 2855 states and 9180 transitions. [2022-02-15 13:40:40,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 13:40:40,311 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 24 [2022-02-15 13:40:40,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:40,316 INFO L225 Difference]: With dead ends: 2855 [2022-02-15 13:40:40,316 INFO L226 Difference]: Without dead ends: 2706 [2022-02-15 13:40:40,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:40:40,316 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 151 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:40,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 262 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 789 Invalid, 0 Unknown, 86 Unchecked, 0.4s Time] [2022-02-15 13:40:40,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2022-02-15 13:40:40,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 2398. [2022-02-15 13:40:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 3.3249895702962036) internal successors, (7970), 2397 states have internal predecessors, (7970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:40,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 7970 transitions. [2022-02-15 13:40:40,348 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 7970 transitions. Word has length 24 [2022-02-15 13:40:40,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:40,348 INFO L470 AbstractCegarLoop]: Abstraction has 2398 states and 7970 transitions. [2022-02-15 13:40:40,348 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) [2022-02-15 13:40:40,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 7970 transitions. [2022-02-15 13:40:40,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:40,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:40,351 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:40,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:40,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2022-02-15 13:40:40,567 INFO L402 AbstractCegarLoop]: === Iteration 477 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:40,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:40,567 INFO L85 PathProgramCache]: Analyzing trace with hash -447039793, now seen corresponding path program 461 times [2022-02-15 13:40:40,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:40,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109745306] [2022-02-15 13:40:40,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:40,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:40,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:40,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109745306] [2022-02-15 13:40:40,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109745306] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:40,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583331616] [2022-02-15 13:40:40,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:40:40,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:40,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:40,799 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) [2022-02-15 13:40:40,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Waiting until timeout for monitored process [2022-02-15 13:40:40,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:40:40,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:40,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:40,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:40,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:40,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:40:41,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:41,015 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-02-15 13:40:41,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:41,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 11 treesize of output 7 [2022-02-15 13:40:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:41,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:41,391 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:41,391 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 77 treesize of output 73 [2022-02-15 13:40:41,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:41,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2022-02-15 13:40:41,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:41,457 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 65 treesize of output 56 [2022-02-15 13:40:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:41,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583331616] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:41,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:41,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:41,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419865834] [2022-02-15 13:40:41,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:41,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:41,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:41,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:41,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:41,518 INFO L87 Difference]: Start difference. First operand 2398 states and 7970 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:41,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:41,815 INFO L93 Difference]: Finished difference Result 2533 states and 8304 transitions. [2022-02-15 13:40:41,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 13:40:41,815 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:41,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:41,819 INFO L225 Difference]: With dead ends: 2533 [2022-02-15 13:40:41,819 INFO L226 Difference]: Without dead ends: 2502 [2022-02-15 13:40:41,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:40:41,820 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:41,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 279 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 646 Invalid, 0 Unknown, 268 Unchecked, 0.2s Time] [2022-02-15 13:40:41,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2022-02-15 13:40:41,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 2426. [2022-02-15 13:40:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2426 states, 2425 states have (on average 3.3162886597938144) internal successors, (8042), 2425 states have internal predecessors, (8042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 8042 transitions. [2022-02-15 13:40:41,848 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 8042 transitions. Word has length 24 [2022-02-15 13:40:41,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:41,848 INFO L470 AbstractCegarLoop]: Abstraction has 2426 states and 8042 transitions. [2022-02-15 13:40:41,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:41,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 8042 transitions. [2022-02-15 13:40:41,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:41,851 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:41,851 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:41,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Ended with exit code 0 [2022-02-15 13:40:42,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable476,462 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:42,066 INFO L402 AbstractCegarLoop]: === Iteration 478 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:42,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1991405233, now seen corresponding path program 462 times [2022-02-15 13:40:42,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:42,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928668492] [2022-02-15 13:40:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:42,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:42,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:42,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928668492] [2022-02-15 13:40:42,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928668492] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:42,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113828350] [2022-02-15 13:40:42,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:40:42,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:42,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:42,204 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) [2022-02-15 13:40:42,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Waiting until timeout for monitored process [2022-02-15 13:40:42,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:40:42,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:42,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:40:42,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:42,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:42,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 41 treesize of output 35 [2022-02-15 13:40:42,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:42,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 29 treesize of output 23 [2022-02-15 13:40:42,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:42,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-02-15 13:40:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:42,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:43,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:43,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 74 [2022-02-15 13:40:43,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:43,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 103 [2022-02-15 13:40:43,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:43,136 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 95 treesize of output 81 [2022-02-15 13:40:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:43,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113828350] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:43,226 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:43,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:43,226 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903658543] [2022-02-15 13:40:43,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:43,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:43,226 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:43,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:43,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:43,227 INFO L87 Difference]: Start difference. First operand 2426 states and 8042 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:43,521 INFO L93 Difference]: Finished difference Result 2816 states and 9054 transitions. [2022-02-15 13:40:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:40:43,521 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:43,526 INFO L225 Difference]: With dead ends: 2816 [2022-02-15 13:40:43,526 INFO L226 Difference]: Without dead ends: 2708 [2022-02-15 13:40:43,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-02-15 13:40:43,526 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 82 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:43,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 252 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 564 Invalid, 0 Unknown, 158 Unchecked, 0.2s Time] [2022-02-15 13:40:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2708 states. [2022-02-15 13:40:43,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2708 to 2398. [2022-02-15 13:40:43,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 3.3249895702962036) internal successors, (7970), 2397 states have internal predecessors, (7970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:43,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 7970 transitions. [2022-02-15 13:40:43,556 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 7970 transitions. Word has length 24 [2022-02-15 13:40:43,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:43,556 INFO L470 AbstractCegarLoop]: Abstraction has 2398 states and 7970 transitions. [2022-02-15 13:40:43,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:43,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 7970 transitions. [2022-02-15 13:40:43,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:43,559 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:43,560 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:43,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Ended with exit code 0 [2022-02-15 13:40:43,767 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,SelfDestructingSolverStorable477 [2022-02-15 13:40:43,767 INFO L402 AbstractCegarLoop]: === Iteration 479 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:43,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:43,767 INFO L85 PathProgramCache]: Analyzing trace with hash -931442563, now seen corresponding path program 463 times [2022-02-15 13:40:43,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:43,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720626336] [2022-02-15 13:40:43,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:43,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:43,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:43,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720626336] [2022-02-15 13:40:43,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720626336] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:43,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003184794] [2022-02-15 13:40:43,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:40:43,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:43,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:43,939 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) [2022-02-15 13:40:43,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Waiting until timeout for monitored process [2022-02-15 13:40:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:43,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:40:43,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:44,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:44,036 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:40:44,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:44,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-02-15 13:40:44,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:44,118 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-02-15 13:40:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:44,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:44,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:44,513 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 78 treesize of output 74 [2022-02-15 13:40:44,619 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:44,619 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 122 treesize of output 108 [2022-02-15 13:40:44,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:44,623 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 100 treesize of output 86 [2022-02-15 13:40:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:44,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003184794] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:44,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:44,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:44,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306215245] [2022-02-15 13:40:44,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:44,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:44,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:44,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:44,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:44,720 INFO L87 Difference]: Start difference. First operand 2398 states and 7970 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:45,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:45,468 INFO L93 Difference]: Finished difference Result 2764 states and 8860 transitions. [2022-02-15 13:40:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 13:40:45,468 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:45,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:45,472 INFO L225 Difference]: With dead ends: 2764 [2022-02-15 13:40:45,472 INFO L226 Difference]: Without dead ends: 2635 [2022-02-15 13:40:45,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:40:45,473 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 132 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:45,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 432 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1191 Invalid, 0 Unknown, 179 Unchecked, 0.4s Time] [2022-02-15 13:40:45,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2635 states. [2022-02-15 13:40:45,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2635 to 2410. [2022-02-15 13:40:45,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2410 states, 2409 states have (on average 3.3217102532171023) internal successors, (8002), 2409 states have internal predecessors, (8002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 8002 transitions. [2022-02-15 13:40:45,502 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 8002 transitions. Word has length 24 [2022-02-15 13:40:45,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:45,502 INFO L470 AbstractCegarLoop]: Abstraction has 2410 states and 8002 transitions. [2022-02-15 13:40:45,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:45,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 8002 transitions. [2022-02-15 13:40:45,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:45,505 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:45,505 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:45,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Ended with exit code 0 [2022-02-15 13:40:45,721 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,SelfDestructingSolverStorable478 [2022-02-15 13:40:45,721 INFO L402 AbstractCegarLoop]: === Iteration 480 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:45,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:45,721 INFO L85 PathProgramCache]: Analyzing trace with hash -242432377, now seen corresponding path program 464 times [2022-02-15 13:40:45,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:45,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127803123] [2022-02-15 13:40:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:45,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:45,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:45,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127803123] [2022-02-15 13:40:45,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127803123] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:45,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241823248] [2022-02-15 13:40:45,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:40:45,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:45,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:45,925 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) [2022-02-15 13:40:45,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Waiting until timeout for monitored process [2022-02-15 13:40:45,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:40:45,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:45,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:45,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:46,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:46,058 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:40:46,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:46,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 24 treesize of output 20 [2022-02-15 13:40:46,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:46,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-02-15 13:40:46,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:46,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:46,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:46,685 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 100 treesize of output 94 [2022-02-15 13:40:46,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:46,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 130 [2022-02-15 13:40:46,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:46,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 102 [2022-02-15 13:40:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:46,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241823248] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:46,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:46,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:46,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206561785] [2022-02-15 13:40:46,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:46,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:46,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:46,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:46,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:46,950 INFO L87 Difference]: Start difference. First operand 2410 states and 8002 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:47,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:47,432 INFO L93 Difference]: Finished difference Result 2598 states and 8461 transitions. [2022-02-15 13:40:47,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:40:47,432 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:47,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:47,436 INFO L225 Difference]: With dead ends: 2598 [2022-02-15 13:40:47,437 INFO L226 Difference]: Without dead ends: 2525 [2022-02-15 13:40:47,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-02-15 13:40:47,437 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 73 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:47,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 246 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 710 Invalid, 0 Unknown, 109 Unchecked, 0.3s Time] [2022-02-15 13:40:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2525 states. [2022-02-15 13:40:47,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2525 to 2408. [2022-02-15 13:40:47,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 3.3223930203572913) internal successors, (7997), 2407 states have internal predecessors, (7997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:47,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 7997 transitions. [2022-02-15 13:40:47,465 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 7997 transitions. Word has length 24 [2022-02-15 13:40:47,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:47,465 INFO L470 AbstractCegarLoop]: Abstraction has 2408 states and 7997 transitions. [2022-02-15 13:40:47,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:47,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 7997 transitions. [2022-02-15 13:40:47,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:47,468 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:47,468 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:47,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Ended with exit code 0 [2022-02-15 13:40:47,683 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,SelfDestructingSolverStorable479 [2022-02-15 13:40:47,683 INFO L402 AbstractCegarLoop]: === Iteration 481 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:47,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:47,683 INFO L85 PathProgramCache]: Analyzing trace with hash -534415871, now seen corresponding path program 465 times [2022-02-15 13:40:47,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:47,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344020099] [2022-02-15 13:40:47,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:47,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:47,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:47,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344020099] [2022-02-15 13:40:47,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344020099] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:47,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147563300] [2022-02-15 13:40:47,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-15 13:40:47,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:47,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:47,830 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) [2022-02-15 13:40:47,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Waiting until timeout for monitored process [2022-02-15 13:40:47,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-15 13:40:47,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:47,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:47,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:47,931 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 39 treesize of output 33 [2022-02-15 13:40:48,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:48,010 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-02-15 13:40:48,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:48,012 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-02-15 13:40:48,059 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:48,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:48,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:48,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 57 [2022-02-15 13:40:48,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:48,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-02-15 13:40:48,563 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:48,563 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 46 treesize of output 43 [2022-02-15 13:40:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:48,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147563300] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:48,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:48,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:48,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542121686] [2022-02-15 13:40:48,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:48,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:48,619 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:48,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:48,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:48,620 INFO L87 Difference]: Start difference. First operand 2408 states and 7997 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:49,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:49,333 INFO L93 Difference]: Finished difference Result 2673 states and 8736 transitions. [2022-02-15 13:40:49,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 13:40:49,334 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:49,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:49,338 INFO L225 Difference]: With dead ends: 2673 [2022-02-15 13:40:49,338 INFO L226 Difference]: Without dead ends: 2614 [2022-02-15 13:40:49,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 13:40:49,338 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 81 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:49,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 218 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 13:40:49,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2022-02-15 13:40:49,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2418. [2022-02-15 13:40:49,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 3.3223003723624327) internal successors, (8030), 2417 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:49,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 8030 transitions. [2022-02-15 13:40:49,372 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 8030 transitions. Word has length 24 [2022-02-15 13:40:49,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:49,372 INFO L470 AbstractCegarLoop]: Abstraction has 2418 states and 8030 transitions. [2022-02-15 13:40:49,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:49,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 8030 transitions. [2022-02-15 13:40:49,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:49,375 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:49,375 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:49,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Ended with exit code 0 [2022-02-15 13:40:49,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,466 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:49,591 INFO L402 AbstractCegarLoop]: === Iteration 482 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:49,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:49,591 INFO L85 PathProgramCache]: Analyzing trace with hash 629517303, now seen corresponding path program 466 times [2022-02-15 13:40:49,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:49,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764104548] [2022-02-15 13:40:49,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:49,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:49,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:49,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764104548] [2022-02-15 13:40:49,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764104548] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:49,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209668068] [2022-02-15 13:40:49,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-15 13:40:49,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:49,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:49,720 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) [2022-02-15 13:40:49,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Waiting until timeout for monitored process [2022-02-15 13:40:49,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-15 13:40:49,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:49,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:49,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:49,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-02-15 13:40:49,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:49,852 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 47 [2022-02-15 13:40:49,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:49,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 55 treesize of output 35 [2022-02-15 13:40:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:49,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:50,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:50,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-02-15 13:40:50,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:50,637 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 126 treesize of output 110 [2022-02-15 13:40:50,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:50,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-02-15 13:40:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:50,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209668068] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:50,702 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:50,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:50,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064654489] [2022-02-15 13:40:50,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:50,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:50,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:50,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:50,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:50,703 INFO L87 Difference]: Start difference. First operand 2418 states and 8030 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:51,283 INFO L93 Difference]: Finished difference Result 2739 states and 8939 transitions. [2022-02-15 13:40:51,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 13:40:51,284 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:51,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:51,288 INFO L225 Difference]: With dead ends: 2739 [2022-02-15 13:40:51,288 INFO L226 Difference]: Without dead ends: 2673 [2022-02-15 13:40:51,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:40:51,289 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 85 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:51,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 258 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 843 Invalid, 0 Unknown, 117 Unchecked, 0.3s Time] [2022-02-15 13:40:51,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2673 states. [2022-02-15 13:40:51,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2673 to 2420. [2022-02-15 13:40:51,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2419 states have (on average 3.3216205043406366) internal successors, (8035), 2419 states have internal predecessors, (8035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 8035 transitions. [2022-02-15 13:40:51,320 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 8035 transitions. Word has length 24 [2022-02-15 13:40:51,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:51,320 INFO L470 AbstractCegarLoop]: Abstraction has 2420 states and 8035 transitions. [2022-02-15 13:40:51,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:51,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 8035 transitions. [2022-02-15 13:40:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:51,323 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:51,324 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:51,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:51,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,467 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:51,539 INFO L402 AbstractCegarLoop]: === Iteration 483 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:51,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:51,540 INFO L85 PathProgramCache]: Analyzing trace with hash 2105134881, now seen corresponding path program 467 times [2022-02-15 13:40:51,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:51,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394236551] [2022-02-15 13:40:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:51,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:51,651 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:51,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:51,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394236551] [2022-02-15 13:40:51,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394236551] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:51,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731936115] [2022-02-15 13:40:51,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-15 13:40:51,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:51,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:51,653 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) [2022-02-15 13:40:51,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Waiting until timeout for monitored process [2022-02-15 13:40:51,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-15 13:40:51,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:51,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:51,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:51,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:51,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:40:51,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:51,784 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-02-15 13:40:51,786 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 12 treesize of output 8 [2022-02-15 13:40:51,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:51,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:52,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:52,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 76 [2022-02-15 13:40:52,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:52,316 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 126 treesize of output 110 [2022-02-15 13:40:52,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:52,321 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 102 treesize of output 86 [2022-02-15 13:40:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:52,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731936115] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:52,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:52,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:52,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627600539] [2022-02-15 13:40:52,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:52,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:52,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:52,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:52,385 INFO L87 Difference]: Start difference. First operand 2420 states and 8035 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:52,690 INFO L93 Difference]: Finished difference Result 2703 states and 8809 transitions. [2022-02-15 13:40:52,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:40:52,691 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:52,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:52,695 INFO L225 Difference]: With dead ends: 2703 [2022-02-15 13:40:52,695 INFO L226 Difference]: Without dead ends: 2633 [2022-02-15 13:40:52,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-02-15 13:40:52,696 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 77 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:52,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 219 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 684 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2022-02-15 13:40:52,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2022-02-15 13:40:52,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 2418. [2022-02-15 13:40:52,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 3.3223003723624327) internal successors, (8030), 2417 states have internal predecessors, (8030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:52,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 8030 transitions. [2022-02-15 13:40:52,726 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 8030 transitions. Word has length 24 [2022-02-15 13:40:52,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:52,727 INFO L470 AbstractCegarLoop]: Abstraction has 2418 states and 8030 transitions. [2022-02-15 13:40:52,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:52,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 8030 transitions. [2022-02-15 13:40:52,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:52,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:52,730 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:52,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Ended with exit code 0 [2022-02-15 13:40:52,943 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,SelfDestructingSolverStorable482 [2022-02-15 13:40:52,943 INFO L402 AbstractCegarLoop]: === Iteration 484 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:52,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:52,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1413446443, now seen corresponding path program 468 times [2022-02-15 13:40:52,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:52,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509449522] [2022-02-15 13:40:52,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:52,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:53,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:53,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509449522] [2022-02-15 13:40:53,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509449522] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:53,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610674954] [2022-02-15 13:40:53,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-15 13:40:53,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:53,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:53,057 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) [2022-02-15 13:40:53,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Waiting until timeout for monitored process [2022-02-15 13:40:53,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-02-15 13:40:53,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:53,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-15 13:40:53,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:53,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:53,146 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:40:53,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-15 13:40:53,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 42 treesize of output 36 [2022-02-15 13:40:53,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-02-15 13:40:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:53,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:53,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:53,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-02-15 13:40:53,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:53,808 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 83 treesize of output 75 [2022-02-15 13:40:53,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:53,812 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 67 treesize of output 59 [2022-02-15 13:40:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:53,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610674954] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:53,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:53,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:53,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785494891] [2022-02-15 13:40:53,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:53,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:53,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:53,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:53,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:53,846 INFO L87 Difference]: Start difference. First operand 2418 states and 8030 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:54,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:54,468 INFO L93 Difference]: Finished difference Result 3080 states and 9974 transitions. [2022-02-15 13:40:54,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 13:40:54,468 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:54,473 INFO L225 Difference]: With dead ends: 3080 [2022-02-15 13:40:54,473 INFO L226 Difference]: Without dead ends: 3018 [2022-02-15 13:40:54,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 13:40:54,473 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 152 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:54,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 272 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 830 Invalid, 0 Unknown, 181 Unchecked, 0.3s Time] [2022-02-15 13:40:54,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2022-02-15 13:40:54,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 2421. [2022-02-15 13:40:54,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2420 states have (on average 3.321900826446281) internal successors, (8039), 2420 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 8039 transitions. [2022-02-15 13:40:54,505 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 8039 transitions. Word has length 24 [2022-02-15 13:40:54,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:54,505 INFO L470 AbstractCegarLoop]: Abstraction has 2421 states and 8039 transitions. [2022-02-15 13:40:54,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:54,505 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 8039 transitions. [2022-02-15 13:40:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:54,508 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:54,508 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:54,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:54,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,469 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:54,724 INFO L402 AbstractCegarLoop]: === Iteration 485 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:54,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:54,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1717078589, now seen corresponding path program 469 times [2022-02-15 13:40:54,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:54,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105284052] [2022-02-15 13:40:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:54,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:54,863 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:54,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105284052] [2022-02-15 13:40:54,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105284052] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:54,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669441009] [2022-02-15 13:40:54,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-15 13:40:54,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:54,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:54,864 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) [2022-02-15 13:40:54,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Waiting until timeout for monitored process [2022-02-15 13:40:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:54,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:54,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:54,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-02-15 13:40:55,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-02-15 13:40:55,005 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 12 treesize of output 8 [2022-02-15 13:40:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:55,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-15 13:40:55,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:55,539 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 78 treesize of output 76 [2022-02-15 13:40:55,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:55,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-02-15 13:40:55,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-15 13:40:55,762 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 102 treesize of output 86 [2022-02-15 13:40:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:55,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669441009] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-15 13:40:55,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-15 13:40:55,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-15 13:40:55,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999716913] [2022-02-15 13:40:55,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-15 13:40:55,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 13:40:55,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-15 13:40:55,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 13:40:55,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-02-15 13:40:55,848 INFO L87 Difference]: Start difference. First operand 2421 states and 8039 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:56,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 13:40:56,590 INFO L93 Difference]: Finished difference Result 2890 states and 9414 transitions. [2022-02-15 13:40:56,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 13:40:56,591 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 24 [2022-02-15 13:40:56,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 13:40:56,596 INFO L225 Difference]: With dead ends: 2890 [2022-02-15 13:40:56,596 INFO L226 Difference]: Without dead ends: 2847 [2022-02-15 13:40:56,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2022-02-15 13:40:56,596 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 116 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 13:40:56,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 366 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1101 Invalid, 0 Unknown, 29 Unchecked, 0.5s Time] [2022-02-15 13:40:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2022-02-15 13:40:56,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2421. [2022-02-15 13:40:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2420 states have (on average 3.321900826446281) internal successors, (8039), 2420 states have internal predecessors, (8039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 13:40:56,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 8039 transitions. [2022-02-15 13:40:56,627 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 8039 transitions. Word has length 24 [2022-02-15 13:40:56,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 13:40:56,627 INFO L470 AbstractCegarLoop]: Abstraction has 2421 states and 8039 transitions. [2022-02-15 13:40:56,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) [2022-02-15 13:40:56,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 8039 transitions. [2022-02-15 13:40:56,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 13:40:56,630 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 13:40:56,630 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 13:40:56,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Ended with exit code 0 [2022-02-15 13:40:56,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,470 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:56,830 INFO L402 AbstractCegarLoop]: === Iteration 486 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-15 13:40:56,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 13:40:56,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1181201153, now seen corresponding path program 470 times [2022-02-15 13:40:56,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-15 13:40:56,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080913091] [2022-02-15 13:40:56,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 13:40:56,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 13:40:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 13:40:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:57,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-15 13:40:57,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080913091] [2022-02-15 13:40:57,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080913091] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-15 13:40:57,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654455501] [2022-02-15 13:40:57,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-15 13:40:57,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:57,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 13:40:57,021 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) [2022-02-15 13:40:57,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Waiting until timeout for monitored process [2022-02-15 13:40:57,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-15 13:40:57,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-15 13:40:57,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-02-15 13:40:57,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-15 13:40:57,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-02-15 13:40:57,202 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 26 treesize of output 22 [2022-02-15 13:40:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-02-15 13:40:57,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-02-15 13:40:57,639 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-02-15 13:40:57,641 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-15 13:40:57,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Forceful destruction successful, exit code 0 [2022-02-15 13:40:57,668 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 [2022-02-15 13:40:57,673 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-15 13:40:57,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485,471 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-15 13:40:57,842 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 4ms.. [2022-02-15 13:40:57,843 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-02-15 13:40:57,843 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-15 13:40:57,844 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-02-15 13:40:57,846 INFO L732 BasicCegarLoop]: Path program histogram: [470, 6, 4, 3, 3] [2022-02-15 13:40:57,847 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-15 13:40:57,847 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-15 13:40:57,848 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 01:40:57 BasicIcfg [2022-02-15 13:40:57,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-15 13:40:57,849 INFO L158 Benchmark]: Toolchain (without parser) took 923356.92ms. Allocated memory was 205.5MB in the beginning and 767.6MB in the end (delta: 562.0MB). Free memory was 164.6MB in the beginning and 581.7MB in the end (delta: -417.1MB). Peak memory consumption was 145.5MB. Max. memory is 8.0GB. [2022-02-15 13:40:57,849 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 205.5MB. Free memory is still 165.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-15 13:40:57,849 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.61ms. Allocated memory is still 205.5MB. Free memory was 164.5MB in the beginning and 162.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 13:40:57,849 INFO L158 Benchmark]: Boogie Preprocessor took 10.40ms. Allocated memory is still 205.5MB. Free memory was 162.9MB in the beginning and 162.0MB in the end (delta: 991.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-15 13:40:57,849 INFO L158 Benchmark]: RCFGBuilder took 214.90ms. Allocated memory is still 205.5MB. Free memory was 161.9MB in the beginning and 149.8MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-15 13:40:57,849 INFO L158 Benchmark]: TraceAbstraction took 923106.71ms. Allocated memory was 205.5MB in the beginning and 767.6MB in the end (delta: 562.0MB). Free memory was 149.3MB in the beginning and 581.7MB in the end (delta: -432.4MB). Peak memory consumption was 130.8MB. Max. memory is 8.0GB. [2022-02-15 13:40:57,849 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 0.10ms. Allocated memory is still 205.5MB. Free memory is still 165.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.61ms. Allocated memory is still 205.5MB. Free memory was 164.5MB in the beginning and 162.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.40ms. Allocated memory is still 205.5MB. Free memory was 162.9MB in the beginning and 162.0MB in the end (delta: 991.9kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 214.90ms. Allocated memory is still 205.5MB. Free memory was 161.9MB in the beginning and 149.8MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 923106.71ms. Allocated memory was 205.5MB in the beginning and 767.6MB in the end (delta: 562.0MB). Free memory was 149.3MB in the beginning and 581.7MB in the end (delta: -432.4MB). Peak memory consumption was 130.8MB. Max. memory is 8.0GB. * 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: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 4ms.. - TimeoutResultAtElement [Line: 97]: 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 25 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 4ms.. - TimeoutResultAtElement [Line: 101]: 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 25 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 4ms.. - TimeoutResultAtElement [Line: 100]: 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 25 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 6 for 4ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 923.0s, OverallIterations: 486, TraceHistogramMax: 5, PathProgramHistogramMax: 470, EmptinessCheckTime: 1.1s, AutomataDifference: 285.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 52682 SdHoareTripleChecker+Valid, 130.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 52682 mSDsluCounter, 130948 SdHoareTripleChecker+Invalid, 112.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 56980 IncrementalHoareTripleChecker+Unchecked, 247500 mSDsCounter, 11035 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 354029 IncrementalHoareTripleChecker+Invalid, 422044 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11035 mSolverCounterUnsat, 10372 mSDtfsCounter, 354029 mSolverCounterSat, 0.7s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 30284 GetRequests, 14994 SyntacticMatches, 1481 SemanticMatches, 13809 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102829 ImplicationChecksByTransitivity, 316.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2426occurred in iteration=477, InterpolantAutomatonStates: 7925, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 10.8s AutomataMinimizationTime, 485 MinimizatonAttempts, 124566 StatesRemovedByMinimization, 482 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.2s SsaConstructionTime, 6.3s SatisfiabilityAnalysisTime, 506.6s InterpolantComputationTime, 22796 NumberOfCodeBlocks, 22729 NumberOfCodeBlocksAsserted, 1676 NumberOfCheckSat, 32624 ConstructedInterpolants, 2453 QuantifiedInterpolants, 833230 SizeOfPredicates, 6396 NumberOfNonLiveVariables, 50617 ConjunctsInSsa, 11400 ConjunctsInUnsatCore, 1423 InterpolantComputations, 16 PerfectInterpolantSequences, 10767/23884 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