/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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 21:57:54,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 21:57:54,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 21:57:54,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 21:57:54,456 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2022-03-15 21:57:54,472 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 21:57:54,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 21:57:54,473 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 21:57:54,473 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 21:57:54,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 21:57:54,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 21:57:54,473 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 21:57:54,473 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 21:57:54,473 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 21:57:54,473 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 21:57:54,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 21:57:54,474 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 21:57:54,474 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 21:57:54,474 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 21:57:54,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 21:57:54,474 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 21:57:54,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 21:57:54,474 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 21:57:54,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 21:57:54,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 21:57:54,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 21:57:54,474 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 21:57:54,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 21:57:54,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:57:54,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 21:57:54,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 21:57:54,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 21:57:54,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 21:57:54,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 21:57:54,475 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 21:57:54,475 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 21:57:54,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 21:57:54,475 INFO L138 SettingsManager]: * Interpolant automaton=MCR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 21:57:54,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 21:57:54,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 21:57:54,669 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 21:57:54,670 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 21:57:54,672 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 21:57:54,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl [2022-03-15 21:57:54,673 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq-array.wvr.bpl' [2022-03-15 21:57:54,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 21:57:54,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 21:57:54,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 21:57:54,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 21:57:54,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 21:57:54,711 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:57:54" (1/1) ... [2022-03-15 21:57:54,721 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:57:54" (1/1) ... [2022-03-15 21:57:54,726 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 21:57:54,727 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 21:57:54,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 21:57:54,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 21:57:54,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 21:57:54,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:57:54" (1/1) ... [2022-03-15 21:57:54,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:57:54" (1/1) ... [2022-03-15 21:57:54,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:57:54" (1/1) ... [2022-03-15 21:57:54,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:57:54" (1/1) ... [2022-03-15 21:57:54,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:57:54" (1/1) ... [2022-03-15 21:57:54,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:57:54" (1/1) ... [2022-03-15 21:57:54,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:57:54" (1/1) ... [2022-03-15 21:57:54,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 21:57:54,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 21:57:54,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 21:57:54,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 21:57:54,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:57:54" (1/1) ... [2022-03-15 21:57:54,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:57:54,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:57:54,767 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) [2022-03-15 21:57:54,770 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 [2022-03-15 21:57:54,797 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 21:57:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 21:57:54,797 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 21:57:54,797 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 21:57:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 21:57:54,797 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 21:57:54,797 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 21:57:54,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 21:57:54,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 21:57:54,798 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 21:57:54,830 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 21:57:54,831 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 21:57:54,895 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 21:57:54,905 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 21:57:54,905 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 21:57:54,907 INFO L202 PluginConnector]: Adding new model dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:57:54 BoogieIcfgContainer [2022-03-15 21:57:54,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 21:57:54,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 21:57:54,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 21:57:54,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 21:57:54,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:57:54" (1/2) ... [2022-03-15 21:57:54,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d636a6e and model type dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 09:57:54, skipping insertion in model container [2022-03-15 21:57:54,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:57:54" (2/2) ... [2022-03-15 21:57:54,912 INFO L111 eAbstractionObserver]: Analyzing ICFG dec-subseq-array.wvr.bpl [2022-03-15 21:57:54,915 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 21:57:54,915 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 21:57:54,916 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 21:57:54,916 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 21:57:54,938 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 21:57:54,965 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 21:57:54,970 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=MCR, 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=true, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 21:57:54,970 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 21:57:54,977 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 21:57:54,983 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 32 places, 28 transitions, 72 flow [2022-03-15 21:57:54,985 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 32 places, 28 transitions, 72 flow [2022-03-15 21:57:54,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 32 places, 28 transitions, 72 flow [2022-03-15 21:57:55,001 INFO L129 PetriNetUnfolder]: 3/26 cut-off events. [2022-03-15 21:57:55,001 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-03-15 21:57:55,003 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 3/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 37 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2022-03-15 21:57:55,004 INFO L116 LiptonReduction]: Number of co-enabled transitions 124 [2022-03-15 21:57:55,398 INFO L131 LiptonReduction]: Checked pairs total: 144 [2022-03-15 21:57:55,398 INFO L133 LiptonReduction]: Total number of compositions: 15 [2022-03-15 21:57:55,407 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 48 flow [2022-03-15 21:57:55,421 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:55,422 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:55,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-03-15 21:57:55,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:57:55,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:57:55,426 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:57:55,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:57:55,430 INFO L85 PathProgramCache]: Analyzing trace with hash -892536048, now seen corresponding path program 1 times [2022-03-15 21:57:55,446 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:57:55,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343860807] [2022-03-15 21:57:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:57:55,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:57:55,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:57:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:57:55,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:57:55,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343860807] [2022-03-15 21:57:55,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343860807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:57:55,538 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:57:55,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-03-15 21:57:55,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1098486884] [2022-03-15 21:57:55,539 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:57:55,544 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:57:55,553 INFO L252 McrAutomatonBuilder]: Finished intersection with 12 states and 14 transitions. [2022-03-15 21:57:55,553 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:57:55,657 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:57:55,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 21:57:55,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:57:55,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 21:57:55,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:57:55,674 INFO L87 Difference]: Start difference. First operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:55,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:57:55,699 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2022-03-15 21:57:55,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:57:55,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-03-15 21:57:55,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:57:55,708 INFO L225 Difference]: With dead ends: 32 [2022-03-15 21:57:55,708 INFO L226 Difference]: Without dead ends: 27 [2022-03-15 21:57:55,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:57:55,711 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:57:55,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:57:55,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-15 21:57:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2022-03-15 21:57:55,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:55,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 47 transitions. [2022-03-15 21:57:55,734 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 47 transitions. Word has length 8 [2022-03-15 21:57:55,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:57:55,734 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 47 transitions. [2022-03-15 21:57:55,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:55,735 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 47 transitions. [2022-03-15 21:57:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 21:57:55,735 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:57:55,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:57:55,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 21:57:55,736 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:57:55,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:57:55,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1252850488, now seen corresponding path program 1 times [2022-03-15 21:57:55,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:57:55,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797294370] [2022-03-15 21:57:55,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:57:55,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:57:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:57:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:57:55,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:57:55,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797294370] [2022-03-15 21:57:55,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797294370] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:57:55,782 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:57:55,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 21:57:55,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1753303745] [2022-03-15 21:57:55,782 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:57:55,783 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:57:55,785 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 24 transitions. [2022-03-15 21:57:55,785 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:57:55,847 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [159#(or (= end start) (< i N)), 158#(< i N)] [2022-03-15 21:57:55,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:57:55,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:57:55,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:57:55,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 21:57:55,849 INFO L87 Difference]: Start difference. First operand 23 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2022-03-15 21:57:55,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:57:55,894 INFO L93 Difference]: Finished difference Result 32 states and 62 transitions. [2022-03-15 21:57:55,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 21:57:55,894 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 10 [2022-03-15 21:57:55,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:57:55,895 INFO L225 Difference]: With dead ends: 32 [2022-03-15 21:57:55,895 INFO L226 Difference]: Without dead ends: 27 [2022-03-15 21:57:55,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 21:57:55,896 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:57:55,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 0 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:57:55,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-15 21:57:55,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-15 21:57:55,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:55,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2022-03-15 21:57:55,900 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 10 [2022-03-15 21:57:55,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:57:55,900 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2022-03-15 21:57:55,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2022-03-15 21:57:55,900 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2022-03-15 21:57:55,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:57:55,901 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:57:55,901 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:57:55,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 21:57:55,901 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:57:55,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:57:55,902 INFO L85 PathProgramCache]: Analyzing trace with hash -745074643, now seen corresponding path program 1 times [2022-03-15 21:57:55,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:57:55,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597899288] [2022-03-15 21:57:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:57:55,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:57:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:57:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:57:55,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:57:55,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597899288] [2022-03-15 21:57:55,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597899288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:57:55,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564400282] [2022-03-15 21:57:55,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:57:55,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:57:55,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:57:55,996 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) [2022-03-15 21:57:55,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 21:57:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:57:56,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:57:56,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:57:56,124 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 13 treesize of output 9 [2022-03-15 21:57:56,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 21:57:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:57:56,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:57:56,250 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 13 treesize of output 9 [2022-03-15 21:57:56,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:57:56,258 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 13 treesize of output 17 [2022-03-15 21:57:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:57:56,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564400282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:57:56,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:57:56,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-03-15 21:57:56,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [960517470] [2022-03-15 21:57:56,338 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:57:56,339 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:57:56,340 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2022-03-15 21:57:56,340 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:57:56,452 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [319#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:57:56,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:57:56,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:57:56,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:57:56,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-15 21:57:56,454 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2022-03-15 21:57:56,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:57:56,525 INFO L93 Difference]: Finished difference Result 59 states and 117 transitions. [2022-03-15 21:57:56,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:57:56,526 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 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 12 [2022-03-15 21:57:56,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:57:56,529 INFO L225 Difference]: With dead ends: 59 [2022-03-15 21:57:56,529 INFO L226 Difference]: Without dead ends: 50 [2022-03-15 21:57:56,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:57:56,530 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:57:56,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:57:56,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-15 21:57:56,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2022-03-15 21:57:56,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:56,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 79 transitions. [2022-03-15 21:57:56,534 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 79 transitions. Word has length 12 [2022-03-15 21:57:56,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:57:56,535 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 79 transitions. [2022-03-15 21:57:56,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 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) [2022-03-15 21:57:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 79 transitions. [2022-03-15 21:57:56,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:57:56,535 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:57:56,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:57:56,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-15 21:57:56,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:57:56,745 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:57:56,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:57:56,745 INFO L85 PathProgramCache]: Analyzing trace with hash 253259973, now seen corresponding path program 2 times [2022-03-15 21:57:56,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:57:56,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845898429] [2022-03-15 21:57:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:57:56,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:57:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:57:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:57:56,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:57:56,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845898429] [2022-03-15 21:57:56,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845898429] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:57:56,784 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:57:56,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 21:57:56,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [399036899] [2022-03-15 21:57:56,784 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:57:56,785 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:57:56,787 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2022-03-15 21:57:56,787 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:57:56,817 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:57:56,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 21:57:56,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:57:56,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 21:57:56,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:57:56,818 INFO L87 Difference]: Start difference. First operand 37 states and 79 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:56,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:57:56,857 INFO L93 Difference]: Finished difference Result 77 states and 154 transitions. [2022-03-15 21:57:56,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 21:57:56,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 21:57:56,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:57:56,858 INFO L225 Difference]: With dead ends: 77 [2022-03-15 21:57:56,858 INFO L226 Difference]: Without dead ends: 68 [2022-03-15 21:57:56,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:57:56,859 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:57:56,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:57:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-15 21:57:56,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2022-03-15 21:57:56,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.2941176470588234) internal successors, (117), 51 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:56,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 117 transitions. [2022-03-15 21:57:56,872 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 117 transitions. Word has length 14 [2022-03-15 21:57:56,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:57:56,872 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 117 transitions. [2022-03-15 21:57:56,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:56,872 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 117 transitions. [2022-03-15 21:57:56,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:57:56,873 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:57:56,873 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:57:56,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 21:57:56,873 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:57:56,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:57:56,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1911032220, now seen corresponding path program 3 times [2022-03-15 21:57:56,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:57:56,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186478213] [2022-03-15 21:57:56,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:57:56,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:57:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:57:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:57:56,921 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:57:56,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186478213] [2022-03-15 21:57:56,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186478213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:57:56,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153024360] [2022-03-15 21:57:56,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:57:56,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:57:56,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:57:56,923 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) [2022-03-15 21:57:56,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 21:57:56,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 21:57:56,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:57:56,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 21:57:56,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:57:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:57:56,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 21:57:56,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153024360] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:57:56,975 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 21:57:56,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-03-15 21:57:56,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [790527831] [2022-03-15 21:57:56,975 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:57:56,976 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:57:56,978 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2022-03-15 21:57:56,978 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:57:57,027 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [686#(or (<= end start) (<= (+ 2 start) end))] [2022-03-15 21:57:57,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:57:57,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:57:57,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:57:57,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-15 21:57:57,029 INFO L87 Difference]: Start difference. First operand 52 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:57,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:57:57,081 INFO L93 Difference]: Finished difference Result 79 states and 163 transitions. [2022-03-15 21:57:57,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 21:57:57,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 21:57:57,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:57:57,084 INFO L225 Difference]: With dead ends: 79 [2022-03-15 21:57:57,084 INFO L226 Difference]: Without dead ends: 79 [2022-03-15 21:57:57,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-15 21:57:57,086 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:57:57,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:57:57,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-15 21:57:57,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2022-03-15 21:57:57,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.263157894736842) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:57,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 129 transitions. [2022-03-15 21:57:57,102 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 129 transitions. Word has length 14 [2022-03-15 21:57:57,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:57:57,103 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 129 transitions. [2022-03-15 21:57:57,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:57,103 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 129 transitions. [2022-03-15 21:57:57,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:57:57,104 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:57:57,104 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:57:57,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 21:57:57,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:57:57,312 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:57:57,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:57:57,312 INFO L85 PathProgramCache]: Analyzing trace with hash -289173252, now seen corresponding path program 4 times [2022-03-15 21:57:57,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:57:57,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14154557] [2022-03-15 21:57:57,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:57:57,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:57:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:57:57,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:57:57,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:57:57,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14154557] [2022-03-15 21:57:57,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14154557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:57:57,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159108192] [2022-03-15 21:57:57,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:57:57,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:57:57,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:57:57,438 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) [2022-03-15 21:57:57,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 21:57:57,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:57:57,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:57:57,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 21:57:57,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:57:57,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:57:57,625 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2022-03-15 21:57:57,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:57:57,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:57:57,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 21:57:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:57:57,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:57:57,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:57:57,863 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 29 [2022-03-15 21:57:57,890 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 21:57:57,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-03-15 21:57:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:57:58,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159108192] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:57:58,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:57:58,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-15 21:57:58,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1803876133] [2022-03-15 21:57:58,118 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:57:58,119 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:57:58,122 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 21:57:58,122 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:57:58,204 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [989#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:57:58,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:57:58,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:57:58,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:57:58,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:57:58,206 INFO L87 Difference]: Start difference. First operand 58 states and 129 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:58,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:57:58,291 INFO L93 Difference]: Finished difference Result 112 states and 229 transitions. [2022-03-15 21:57:58,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:57:58,291 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:57:58,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:57:58,292 INFO L225 Difference]: With dead ends: 112 [2022-03-15 21:57:58,292 INFO L226 Difference]: Without dead ends: 90 [2022-03-15 21:57:58,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:57:58,294 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:57:58,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:57:58,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-15 21:57:58,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2022-03-15 21:57:58,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:58,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 132 transitions. [2022-03-15 21:57:58,308 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 132 transitions. Word has length 16 [2022-03-15 21:57:58,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:57:58,308 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 132 transitions. [2022-03-15 21:57:58,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:58,308 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 132 transitions. [2022-03-15 21:57:58,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:57:58,309 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:57:58,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:57:58,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 21:57:58,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:57:58,511 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:57:58,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:57:58,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1827578112, now seen corresponding path program 5 times [2022-03-15 21:57:58,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:57:58,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148699499] [2022-03-15 21:57:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:57:58,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:57:58,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:57:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:57:58,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:57:58,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148699499] [2022-03-15 21:57:58,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148699499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:57:58,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936895294] [2022-03-15 21:57:58,603 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:57:58,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:57:58,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:57:58,604 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) [2022-03-15 21:57:58,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 21:57:58,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:57:58,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:57:58,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 21:57:58,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:57:58,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:57:58,751 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-03-15 21:57:58,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:57:58,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:57:58,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 21:57:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:57:58,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:57:58,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:57:58,977 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 32 treesize of output 30 [2022-03-15 21:57:59,004 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 21:57:59,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 64 [2022-03-15 21:57:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:57:59,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936895294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:57:59,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:57:59,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-15 21:57:59,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [659140232] [2022-03-15 21:57:59,137 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:57:59,139 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:57:59,142 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2022-03-15 21:57:59,142 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:57:59,248 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1334#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start))), 1333#(and ok (<= (select A i) v_old) (= end start))] [2022-03-15 21:57:59,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:57:59,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:57:59,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:57:59,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:57:59,250 INFO L87 Difference]: Start difference. First operand 61 states and 132 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:59,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:57:59,358 INFO L93 Difference]: Finished difference Result 112 states and 222 transitions. [2022-03-15 21:57:59,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:57:59,358 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:57:59,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:57:59,359 INFO L225 Difference]: With dead ends: 112 [2022-03-15 21:57:59,359 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 21:57:59,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:57:59,359 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:57:59,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 1 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:57:59,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 21:57:59,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 46. [2022-03-15 21:57:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 98 transitions. [2022-03-15 21:57:59,362 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 98 transitions. Word has length 16 [2022-03-15 21:57:59,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:57:59,363 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 98 transitions. [2022-03-15 21:57:59,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:57:59,363 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 98 transitions. [2022-03-15 21:57:59,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:57:59,364 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:57:59,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:57:59,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 21:57:59,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:57:59,575 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:57:59,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:57:59,576 INFO L85 PathProgramCache]: Analyzing trace with hash 754492732, now seen corresponding path program 6 times [2022-03-15 21:57:59,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:57:59,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823181183] [2022-03-15 21:57:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:57:59,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:57:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:57:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:57:59,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:57:59,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823181183] [2022-03-15 21:57:59,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823181183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:57:59,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848524323] [2022-03-15 21:57:59,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:57:59,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:57:59,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:57:59,669 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) [2022-03-15 21:57:59,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 21:57:59,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:57:59,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:57:59,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 21:57:59,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:57:59,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:57:59,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 25 [2022-03-15 21:57:59,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:57:59,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:57:59,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 21:57:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:57:59,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:00,054 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 21:58:00,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-15 21:58:00,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:00,062 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 42 treesize of output 38 [2022-03-15 21:58:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:00,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848524323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:00,340 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:00,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-15 21:58:00,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [895199534] [2022-03-15 21:58:00,341 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:00,342 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:00,344 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 21:58:00,344 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:00,426 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1649#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:58:00,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:58:00,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:00,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:58:00,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:58:00,427 INFO L87 Difference]: Start difference. First operand 46 states and 98 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:00,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:00,510 INFO L93 Difference]: Finished difference Result 113 states and 240 transitions. [2022-03-15 21:58:00,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:58:00,510 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:58:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:00,511 INFO L225 Difference]: With dead ends: 113 [2022-03-15 21:58:00,511 INFO L226 Difference]: Without dead ends: 104 [2022-03-15 21:58:00,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:58:00,511 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:00,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:58:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-15 21:58:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 59. [2022-03-15 21:58:00,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.2758620689655173) internal successors, (132), 58 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 132 transitions. [2022-03-15 21:58:00,514 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 132 transitions. Word has length 16 [2022-03-15 21:58:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:00,514 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 132 transitions. [2022-03-15 21:58:00,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 132 transitions. [2022-03-15 21:58:00,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:58:00,515 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:00,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:00,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-15 21:58:00,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:00,734 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:00,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:00,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1753297468, now seen corresponding path program 7 times [2022-03-15 21:58:00,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:00,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454329248] [2022-03-15 21:58:00,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:00,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:00,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:00,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454329248] [2022-03-15 21:58:00,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454329248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:00,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919342398] [2022-03-15 21:58:00,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:58:00,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:00,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:00,871 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) [2022-03-15 21:58:00,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 21:58:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:00,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 21:58:00,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:00,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:00,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2022-03-15 21:58:01,053 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 21:58:01,053 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 22 treesize of output 10 [2022-03-15 21:58:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:01,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:01,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:01,194 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 31 treesize of output 29 [2022-03-15 21:58:01,222 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 21:58:01,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-03-15 21:58:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:01,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919342398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:01,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:01,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-15 21:58:01,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [4837771] [2022-03-15 21:58:01,419 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:01,421 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:01,423 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 36 transitions. [2022-03-15 21:58:01,423 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:01,550 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1987#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:58:01,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:58:01,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:01,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:58:01,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-03-15 21:58:01,550 INFO L87 Difference]: Start difference. First operand 59 states and 132 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:01,672 INFO L93 Difference]: Finished difference Result 127 states and 275 transitions. [2022-03-15 21:58:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:58:01,672 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:58:01,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:01,673 INFO L225 Difference]: With dead ends: 127 [2022-03-15 21:58:01,673 INFO L226 Difference]: Without dead ends: 118 [2022-03-15 21:58:01,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:58:01,674 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:01,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:58:01,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-15 21:58:01,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 64. [2022-03-15 21:58:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.2857142857142856) internal successors, (144), 63 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:01,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 144 transitions. [2022-03-15 21:58:01,678 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 144 transitions. Word has length 16 [2022-03-15 21:58:01,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:01,679 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 144 transitions. [2022-03-15 21:58:01,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:01,679 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 144 transitions. [2022-03-15 21:58:01,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:58:01,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:01,683 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:01,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 21:58:01,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:01,904 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:01,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:01,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1771504108, now seen corresponding path program 8 times [2022-03-15 21:58:01,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:01,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018032080] [2022-03-15 21:58:01,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:01,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:01,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:58:01,929 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:01,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018032080] [2022-03-15 21:58:01,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018032080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:01,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137924290] [2022-03-15 21:58:01,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:58:01,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:01,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:01,930 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) [2022-03-15 21:58:01,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 21:58:01,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:58:01,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:58:01,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 21:58:01,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:58:01,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:58:02,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137924290] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:02,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:02,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-15 21:58:02,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2128573776] [2022-03-15 21:58:02,002 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:02,004 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:02,008 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 30 transitions. [2022-03-15 21:58:02,008 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:02,027 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:58:02,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:58:02,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:02,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:58:02,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 21:58:02,028 INFO L87 Difference]: Start difference. First operand 64 states and 144 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:02,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:02,064 INFO L93 Difference]: Finished difference Result 133 states and 275 transitions. [2022-03-15 21:58:02,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 21:58:02,064 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2022-03-15 21:58:02,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:02,065 INFO L225 Difference]: With dead ends: 133 [2022-03-15 21:58:02,065 INFO L226 Difference]: Without dead ends: 120 [2022-03-15 21:58:02,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 21:58:02,065 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:02,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:58:02,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-15 21:58:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2022-03-15 21:58:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.2989690721649483) internal successors, (223), 97 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 223 transitions. [2022-03-15 21:58:02,073 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 223 transitions. Word has length 18 [2022-03-15 21:58:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:02,073 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 223 transitions. [2022-03-15 21:58:02,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:02,073 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 223 transitions. [2022-03-15 21:58:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:58:02,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:02,074 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:02,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 21:58:02,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:02,287 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:02,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:02,288 INFO L85 PathProgramCache]: Analyzing trace with hash -381016437, now seen corresponding path program 9 times [2022-03-15 21:58:02,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:02,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59055391] [2022-03-15 21:58:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:02,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:02,427 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:02,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59055391] [2022-03-15 21:58:02,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59055391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:02,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746101188] [2022-03-15 21:58:02,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:58:02,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:02,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:02,429 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) [2022-03-15 21:58:02,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 21:58:02,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:58:02,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:58:02,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 21:58:02,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:02,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:02,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2022-03-15 21:58:02,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:02,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:02,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:02,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 29 treesize of output 63 [2022-03-15 21:58:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:03,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:04,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:04,596 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-03-15 21:58:04,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 102 [2022-03-15 21:58:04,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:04,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 93 [2022-03-15 21:58:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:05,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746101188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:05,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:05,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-03-15 21:58:05,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1946275577] [2022-03-15 21:58:05,335 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:05,336 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:05,340 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 21:58:05,340 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:05,426 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2821#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:58:05,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:58:05,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:05,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:58:05,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:58:05,427 INFO L87 Difference]: Start difference. First operand 98 states and 223 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:05,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:05,558 INFO L93 Difference]: Finished difference Result 161 states and 352 transitions. [2022-03-15 21:58:05,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:58:05,558 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:58:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:05,559 INFO L225 Difference]: With dead ends: 161 [2022-03-15 21:58:05,559 INFO L226 Difference]: Without dead ends: 146 [2022-03-15 21:58:05,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:58:05,559 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:05,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:58:05,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-15 21:58:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2022-03-15 21:58:05,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.292929292929293) internal successors, (227), 99 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 227 transitions. [2022-03-15 21:58:05,562 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 227 transitions. Word has length 20 [2022-03-15 21:58:05,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:05,562 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 227 transitions. [2022-03-15 21:58:05,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:05,562 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 227 transitions. [2022-03-15 21:58:05,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:58:05,563 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:05,563 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:05,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-15 21:58:05,771 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,SelfDestructingSolverStorable10 [2022-03-15 21:58:05,771 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:05,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:05,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1406160659, now seen corresponding path program 10 times [2022-03-15 21:58:05,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:05,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649223781] [2022-03-15 21:58:05,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:05,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:05,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:05,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649223781] [2022-03-15 21:58:05,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649223781] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:05,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227247969] [2022-03-15 21:58:05,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:58:05,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:05,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:05,904 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) [2022-03-15 21:58:05,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 21:58:05,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:58:05,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:58:05,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:58:05,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:06,150 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:06,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2022-03-15 21:58:06,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:06,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:06,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:06,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:06,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:06,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:06,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:06,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-03-15 21:58:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:06,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:06,671 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:06,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 56 [2022-03-15 21:58:06,734 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:58:06,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 93 treesize of output 133 [2022-03-15 21:58:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:07,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227247969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:07,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:07,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 21:58:07,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [134923075] [2022-03-15 21:58:07,747 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:07,748 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:07,752 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 21:58:07,752 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:07,876 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3323#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:58:07,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:58:07,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:07,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:58:07,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:58:07,877 INFO L87 Difference]: Start difference. First operand 100 states and 227 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:08,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:08,012 INFO L93 Difference]: Finished difference Result 201 states and 445 transitions. [2022-03-15 21:58:08,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:58:08,012 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:58:08,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:08,013 INFO L225 Difference]: With dead ends: 201 [2022-03-15 21:58:08,013 INFO L226 Difference]: Without dead ends: 182 [2022-03-15 21:58:08,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:58:08,013 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:08,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 1 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:58:08,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-15 21:58:08,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 94. [2022-03-15 21:58:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.2903225806451615) internal successors, (213), 93 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 213 transitions. [2022-03-15 21:58:08,016 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 213 transitions. Word has length 20 [2022-03-15 21:58:08,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:08,016 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 213 transitions. [2022-03-15 21:58:08,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:08,016 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 213 transitions. [2022-03-15 21:58:08,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:58:08,017 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:08,017 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:08,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 21:58:08,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:08,225 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:08,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:08,225 INFO L85 PathProgramCache]: Analyzing trace with hash -467270005, now seen corresponding path program 11 times [2022-03-15 21:58:08,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:08,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008988909] [2022-03-15 21:58:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:08,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:58:08,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:08,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008988909] [2022-03-15 21:58:08,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008988909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:08,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882134661] [2022-03-15 21:58:08,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:58:08,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:08,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:08,395 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) [2022-03-15 21:58:08,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 21:58:08,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:58:08,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:58:08,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 21:58:08,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:08,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:08,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2022-03-15 21:58:08,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:08,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:08,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:08,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:08,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:08,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:08,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:08,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-03-15 21:58:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:08,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:09,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:09,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:09,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:09,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:09,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:09,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:09,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:09,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:09,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:09,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:09,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 94 [2022-03-15 21:58:09,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:09,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 91 [2022-03-15 21:58:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:09,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882134661] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:09,416 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:09,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-03-15 21:58:09,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1530125952] [2022-03-15 21:58:09,416 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:09,418 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:09,421 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 21:58:09,421 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:09,514 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3855#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:58:09,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:58:09,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:09,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:58:09,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:58:09,515 INFO L87 Difference]: Start difference. First operand 94 states and 213 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:09,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:09,652 INFO L93 Difference]: Finished difference Result 165 states and 350 transitions. [2022-03-15 21:58:09,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:58:09,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:58:09,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:09,653 INFO L225 Difference]: With dead ends: 165 [2022-03-15 21:58:09,653 INFO L226 Difference]: Without dead ends: 140 [2022-03-15 21:58:09,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:58:09,653 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:09,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:58:09,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-15 21:58:09,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 101. [2022-03-15 21:58:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.29) internal successors, (229), 100 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 229 transitions. [2022-03-15 21:58:09,656 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 229 transitions. Word has length 20 [2022-03-15 21:58:09,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:09,656 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 229 transitions. [2022-03-15 21:58:09,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:09,656 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 229 transitions. [2022-03-15 21:58:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:58:09,657 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:09,657 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:09,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 21:58:09,863 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,SelfDestructingSolverStorable12 [2022-03-15 21:58:09,863 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:09,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:09,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1931394221, now seen corresponding path program 12 times [2022-03-15 21:58:09,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:09,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71675170] [2022-03-15 21:58:09,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:09,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:09,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:58:10,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:10,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71675170] [2022-03-15 21:58:10,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71675170] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:10,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046143684] [2022-03-15 21:58:10,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:58:10,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:10,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:10,002 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) [2022-03-15 21:58:10,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 21:58:10,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:58:10,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:58:10,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 21:58:10,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:10,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:10,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2022-03-15 21:58:10,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:10,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:10,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:10,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:10,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:10,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:10,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 41 [2022-03-15 21:58:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:10,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:11,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:11,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:11,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:11,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:11,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:11,238 INFO L353 Elim1Store]: treesize reduction 14, result has 79.7 percent of original size [2022-03-15 21:58:11,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 54 treesize of output 84 [2022-03-15 21:58:11,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:11,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 75 [2022-03-15 21:58:12,086 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:12,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046143684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:12,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:12,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 25 [2022-03-15 21:58:12,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [55120376] [2022-03-15 21:58:12,087 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:12,088 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:12,092 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 21:58:12,092 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:12,224 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4368#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:58:12,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:58:12,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:12,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:58:12,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:58:12,225 INFO L87 Difference]: Start difference. First operand 101 states and 229 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:12,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:12,354 INFO L93 Difference]: Finished difference Result 262 states and 593 transitions. [2022-03-15 21:58:12,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:58:12,354 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:58:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:12,357 INFO L225 Difference]: With dead ends: 262 [2022-03-15 21:58:12,357 INFO L226 Difference]: Without dead ends: 243 [2022-03-15 21:58:12,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:58:12,358 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:12,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:58:12,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-15 21:58:12,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 111. [2022-03-15 21:58:12,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:12,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 253 transitions. [2022-03-15 21:58:12,363 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 253 transitions. Word has length 20 [2022-03-15 21:58:12,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:12,363 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 253 transitions. [2022-03-15 21:58:12,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:12,363 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 253 transitions. [2022-03-15 21:58:12,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:58:12,364 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:12,364 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:12,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 21:58:12,577 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,SelfDestructingSolverStorable13 [2022-03-15 21:58:12,578 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:12,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:12,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1040041521, now seen corresponding path program 13 times [2022-03-15 21:58:12,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:12,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233749953] [2022-03-15 21:58:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:12,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:58:12,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:12,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233749953] [2022-03-15 21:58:12,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233749953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:12,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100755502] [2022-03-15 21:58:12,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:58:12,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:12,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:12,718 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) [2022-03-15 21:58:12,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 21:58:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:12,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:58:12,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:12,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:12,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2022-03-15 21:58:13,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:13,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:13,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:13,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:13,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:13,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:13,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:13,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-03-15 21:58:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:13,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:13,522 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:58:13,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 113 [2022-03-15 21:58:13,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:13,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 94 [2022-03-15 21:58:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:14,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100755502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:14,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:14,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-03-15 21:58:14,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1325736361] [2022-03-15 21:58:14,190 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:14,191 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:14,194 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 21:58:14,194 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:14,311 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [4993#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start))), 4994#(and (<= (+ start 1) end) (<= (select A i) (select queue start)) (<= end (+ start 1)) (<= (select queue start) v_old) ok)] [2022-03-15 21:58:14,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:58:14,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:14,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:58:14,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:58:14,312 INFO L87 Difference]: Start difference. First operand 111 states and 253 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:14,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:14,449 INFO L93 Difference]: Finished difference Result 237 states and 529 transitions. [2022-03-15 21:58:14,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:58:14,449 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:58:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:14,450 INFO L225 Difference]: With dead ends: 237 [2022-03-15 21:58:14,450 INFO L226 Difference]: Without dead ends: 218 [2022-03-15 21:58:14,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:58:14,451 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:14,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:58:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-15 21:58:14,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 122. [2022-03-15 21:58:14,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.322314049586777) internal successors, (281), 121 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 281 transitions. [2022-03-15 21:58:14,454 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 281 transitions. Word has length 20 [2022-03-15 21:58:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:14,454 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 281 transitions. [2022-03-15 21:58:14,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 281 transitions. [2022-03-15 21:58:14,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:58:14,455 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:14,455 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:14,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 21:58:14,671 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,SelfDestructingSolverStorable14 [2022-03-15 21:58:14,671 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:14,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:14,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1305244897, now seen corresponding path program 14 times [2022-03-15 21:58:14,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:14,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211065525] [2022-03-15 21:58:14,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:14,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:14,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:14,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211065525] [2022-03-15 21:58:14,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211065525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:14,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696453906] [2022-03-15 21:58:14,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:58:14,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:14,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:14,819 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) [2022-03-15 21:58:14,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 21:58:14,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:58:14,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:58:14,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:58:14,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:15,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:15,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2022-03-15 21:58:15,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:15,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:15,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:15,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:15,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:15,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:15,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-03-15 21:58:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:15,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:15,629 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:58:15,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 113 [2022-03-15 21:58:15,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:15,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 94 [2022-03-15 21:58:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:16,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696453906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:16,264 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:16,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-15 21:58:16,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [7763039] [2022-03-15 21:58:16,264 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:16,265 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:16,269 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 21:58:16,269 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:16,383 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [5615#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start))), 5616#(and (<= (+ start 1) end) (<= (select A i) (select queue start)) (<= end (+ start 1)) (<= (select queue start) v_old) ok)] [2022-03-15 21:58:16,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:58:16,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:16,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:58:16,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:58:16,384 INFO L87 Difference]: Start difference. First operand 122 states and 281 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:16,583 INFO L93 Difference]: Finished difference Result 284 states and 626 transitions. [2022-03-15 21:58:16,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:58:16,583 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:58:16,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:16,584 INFO L225 Difference]: With dead ends: 284 [2022-03-15 21:58:16,584 INFO L226 Difference]: Without dead ends: 248 [2022-03-15 21:58:16,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:58:16,585 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:16,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:58:16,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-15 21:58:16,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 140. [2022-03-15 21:58:16,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.3309352517985613) internal successors, (324), 139 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 324 transitions. [2022-03-15 21:58:16,588 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 324 transitions. Word has length 20 [2022-03-15 21:58:16,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:16,588 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 324 transitions. [2022-03-15 21:58:16,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:16,589 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 324 transitions. [2022-03-15 21:58:16,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:58:16,589 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:16,589 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:16,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 21:58:16,789 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,SelfDestructingSolverStorable15 [2022-03-15 21:58:16,790 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:16,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:16,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1482940661, now seen corresponding path program 15 times [2022-03-15 21:58:16,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:16,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727611699] [2022-03-15 21:58:16,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:16,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:16,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:16,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727611699] [2022-03-15 21:58:16,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727611699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:16,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055019165] [2022-03-15 21:58:16,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:58:16,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:16,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:16,949 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) [2022-03-15 21:58:16,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 21:58:16,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:58:16,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:58:16,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:58:16,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:17,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:17,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 55 [2022-03-15 21:58:17,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:17,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:17,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:17,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:17,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:17,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:17,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 72 [2022-03-15 21:58:17,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:17,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:18,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:18,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:18,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:18,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:18,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:18,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:18,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:18,103 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:18,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 56 [2022-03-15 21:58:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:18,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055019165] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:18,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:18,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2022-03-15 21:58:18,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1890991627] [2022-03-15 21:58:18,467 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:18,469 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:18,472 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 21:58:18,472 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:18,560 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6326#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:58:18,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:58:18,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:18,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:58:18,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:58:18,561 INFO L87 Difference]: Start difference. First operand 140 states and 324 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:18,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:18,746 INFO L93 Difference]: Finished difference Result 306 states and 711 transitions. [2022-03-15 21:58:18,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:58:18,747 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:58:18,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:18,748 INFO L225 Difference]: With dead ends: 306 [2022-03-15 21:58:18,748 INFO L226 Difference]: Without dead ends: 297 [2022-03-15 21:58:18,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:58:18,748 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:18,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 1 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:58:18,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-15 21:58:18,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 161. [2022-03-15 21:58:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.35) internal successors, (376), 160 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 376 transitions. [2022-03-15 21:58:18,753 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 376 transitions. Word has length 20 [2022-03-15 21:58:18,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:18,753 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 376 transitions. [2022-03-15 21:58:18,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:18,753 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 376 transitions. [2022-03-15 21:58:18,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:58:18,753 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:18,754 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:18,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 21:58:18,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:18,963 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:18,964 INFO L85 PathProgramCache]: Analyzing trace with hash 304236435, now seen corresponding path program 16 times [2022-03-15 21:58:18,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:18,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613469100] [2022-03-15 21:58:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:18,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:19,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:19,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613469100] [2022-03-15 21:58:19,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613469100] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:19,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458542867] [2022-03-15 21:58:19,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:58:19,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:19,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:19,143 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) [2022-03-15 21:58:19,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 21:58:19,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:58:19,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:58:19,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:58:19,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:19,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:19,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2022-03-15 21:58:19,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:19,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:19,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:19,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:19,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:19,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:19,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-03-15 21:58:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:19,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:19,964 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:58:19,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 113 [2022-03-15 21:58:19,979 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:19,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 94 [2022-03-15 21:58:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:20,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458542867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:20,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:20,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-03-15 21:58:20,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1145244703] [2022-03-15 21:58:20,681 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:20,683 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:20,686 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 21:58:20,686 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:20,818 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7095#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:58:20,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:58:20,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:20,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:58:20,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:58:20,819 INFO L87 Difference]: Start difference. First operand 161 states and 376 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:20,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:20,988 INFO L93 Difference]: Finished difference Result 317 states and 734 transitions. [2022-03-15 21:58:20,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:58:20,989 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:58:20,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:20,990 INFO L225 Difference]: With dead ends: 317 [2022-03-15 21:58:20,990 INFO L226 Difference]: Without dead ends: 308 [2022-03-15 21:58:20,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:58:20,991 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:20,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 1 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:58:20,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-15 21:58:20,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 159. [2022-03-15 21:58:20,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.367088607594937) internal successors, (374), 158 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:20,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 374 transitions. [2022-03-15 21:58:20,995 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 374 transitions. Word has length 20 [2022-03-15 21:58:20,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:20,995 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 374 transitions. [2022-03-15 21:58:20,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:20,995 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 374 transitions. [2022-03-15 21:58:20,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:58:20,995 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:20,996 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:21,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 21:58:21,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 21:58:21,207 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:21,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:21,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1016589853, now seen corresponding path program 17 times [2022-03-15 21:58:21,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:21,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170883426] [2022-03-15 21:58:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:21,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:21,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:21,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170883426] [2022-03-15 21:58:21,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170883426] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:21,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706344262] [2022-03-15 21:58:21,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:58:21,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:21,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:21,353 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) [2022-03-15 21:58:21,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 21:58:21,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:58:21,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:58:21,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 21:58:21,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:21,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:21,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-03-15 21:58:21,667 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 21:58:21,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 13 [2022-03-15 21:58:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:21,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:22,053 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:58:22,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 114 [2022-03-15 21:58:22,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:22,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 95 [2022-03-15 21:58:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:22,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706344262] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:22,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:22,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-03-15 21:58:22,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1502646649] [2022-03-15 21:58:22,641 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:22,643 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:22,646 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 48 transitions. [2022-03-15 21:58:22,646 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:22,878 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7869#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:58:22,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:58:22,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:22,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:58:22,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:58:22,879 INFO L87 Difference]: Start difference. First operand 159 states and 374 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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) [2022-03-15 21:58:23,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:23,071 INFO L93 Difference]: Finished difference Result 327 states and 758 transitions. [2022-03-15 21:58:23,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:58:23,072 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:58:23,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:23,073 INFO L225 Difference]: With dead ends: 327 [2022-03-15 21:58:23,073 INFO L226 Difference]: Without dead ends: 318 [2022-03-15 21:58:23,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:58:23,073 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:23,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:58:23,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-03-15 21:58:23,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 164. [2022-03-15 21:58:23,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.3680981595092025) internal successors, (386), 163 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:23,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 386 transitions. [2022-03-15 21:58:23,079 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 386 transitions. Word has length 20 [2022-03-15 21:58:23,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:23,079 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 386 transitions. [2022-03-15 21:58:23,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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) [2022-03-15 21:58:23,079 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 386 transitions. [2022-03-15 21:58:23,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:58:23,079 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:23,079 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:23,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 21:58:23,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:23,291 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:23,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:23,292 INFO L85 PathProgramCache]: Analyzing trace with hash -166379485, now seen corresponding path program 18 times [2022-03-15 21:58:23,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:23,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684150738] [2022-03-15 21:58:23,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:23,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:58:23,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:23,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684150738] [2022-03-15 21:58:23,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684150738] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:23,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795993475] [2022-03-15 21:58:23,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:58:23,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:23,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:23,327 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) [2022-03-15 21:58:23,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 21:58:23,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:58:23,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:58:23,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:58:23,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:58:23,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:58:23,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795993475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:23,466 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:23,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-15 21:58:23,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1489339454] [2022-03-15 21:58:23,466 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:23,468 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:23,472 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 34 transitions. [2022-03-15 21:58:23,472 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:23,494 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:58:23,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:58:23,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:58:23,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 21:58:23,495 INFO L87 Difference]: Start difference. First operand 164 states and 386 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:23,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:23,546 INFO L93 Difference]: Finished difference Result 283 states and 632 transitions. [2022-03-15 21:58:23,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:58:23,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 21:58:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:23,547 INFO L225 Difference]: With dead ends: 283 [2022-03-15 21:58:23,547 INFO L226 Difference]: Without dead ends: 266 [2022-03-15 21:58:23,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 21:58:23,547 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:23,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:58:23,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-15 21:58:23,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 214. [2022-03-15 21:58:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.39906103286385) internal successors, (511), 213 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:23,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 511 transitions. [2022-03-15 21:58:23,552 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 511 transitions. Word has length 22 [2022-03-15 21:58:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:23,552 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 511 transitions. [2022-03-15 21:58:23,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 511 transitions. [2022-03-15 21:58:23,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:58:23,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:23,552 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:23,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 21:58:23,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:23,755 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:23,756 INFO L85 PathProgramCache]: Analyzing trace with hash -689732318, now seen corresponding path program 19 times [2022-03-15 21:58:23,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:23,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354270419] [2022-03-15 21:58:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:23,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:23,906 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:58:23,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:23,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354270419] [2022-03-15 21:58:23,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354270419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:23,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571040677] [2022-03-15 21:58:23,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:58:23,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:23,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:23,908 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) [2022-03-15 21:58:23,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 21:58:23,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:23,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:58:23,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:24,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:24,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2022-03-15 21:58:24,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:24,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:24,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:24,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:24,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:24,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:24,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:24,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:24,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:24,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:24,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:24,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:24,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:24,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2022-03-15 21:58:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:24,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:25,293 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:58:25,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 190 [2022-03-15 21:58:25,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:25,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 179 [2022-03-15 21:58:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:28,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571040677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:28,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:28,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-03-15 21:58:28,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [598718162] [2022-03-15 21:58:28,567 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:28,569 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:28,574 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 44 transitions. [2022-03-15 21:58:28,574 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:28,693 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9538#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:58:28,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:58:28,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:28,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:58:28,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:58:28,694 INFO L87 Difference]: Start difference. First operand 214 states and 511 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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) [2022-03-15 21:58:28,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:28,857 INFO L93 Difference]: Finished difference Result 523 states and 1246 transitions. [2022-03-15 21:58:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:58:28,857 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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 24 [2022-03-15 21:58:28,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:28,859 INFO L225 Difference]: With dead ends: 523 [2022-03-15 21:58:28,859 INFO L226 Difference]: Without dead ends: 504 [2022-03-15 21:58:28,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:58:28,859 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:28,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 1 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:58:28,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-03-15 21:58:28,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 192. [2022-03-15 21:58:28,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.4083769633507854) internal successors, (460), 191 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:28,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 460 transitions. [2022-03-15 21:58:28,864 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 460 transitions. Word has length 24 [2022-03-15 21:58:28,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:28,865 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 460 transitions. [2022-03-15 21:58:28,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 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) [2022-03-15 21:58:28,865 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 460 transitions. [2022-03-15 21:58:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:58:28,865 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:28,865 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:28,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 21:58:29,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:29,071 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:29,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:29,072 INFO L85 PathProgramCache]: Analyzing trace with hash 201620382, now seen corresponding path program 20 times [2022-03-15 21:58:29,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:29,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21754841] [2022-03-15 21:58:29,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:29,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:58:29,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:29,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21754841] [2022-03-15 21:58:29,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21754841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:29,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757496545] [2022-03-15 21:58:29,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:58:29,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:29,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:29,256 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) [2022-03-15 21:58:29,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 21:58:29,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:58:29,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:58:29,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:58:29,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:29,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:29,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2022-03-15 21:58:29,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:29,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:29,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:29,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:29,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:29,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:29,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:29,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:29,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:29,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:29,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:29,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:29,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:29,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2022-03-15 21:58:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:29,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:30,690 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:58:30,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 190 [2022-03-15 21:58:30,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:30,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 179 [2022-03-15 21:58:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:32,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757496545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:32,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:32,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-03-15 21:58:32,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [575228994] [2022-03-15 21:58:32,199 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:32,201 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:32,207 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2022-03-15 21:58:32,207 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:32,333 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [10619#(and (<= (+ start 1) end) (<= (select A i) (select queue start)) (<= end (+ start 1)) (<= (select queue start) v_old) ok), 10620#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:58:32,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:58:32,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:32,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:58:32,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:58:32,348 INFO L87 Difference]: Start difference. First operand 192 states and 460 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:32,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:32,555 INFO L93 Difference]: Finished difference Result 301 states and 675 transitions. [2022-03-15 21:58:32,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:58:32,555 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:58:32,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:32,556 INFO L225 Difference]: With dead ends: 301 [2022-03-15 21:58:32,556 INFO L226 Difference]: Without dead ends: 267 [2022-03-15 21:58:32,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:58:32,557 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:32,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 1 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:58:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-15 21:58:32,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 182. [2022-03-15 21:58:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.386740331491713) internal successors, (432), 181 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 432 transitions. [2022-03-15 21:58:32,561 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 432 transitions. Word has length 24 [2022-03-15 21:58:32,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:32,561 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 432 transitions. [2022-03-15 21:58:32,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:32,561 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 432 transitions. [2022-03-15 21:58:32,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:58:32,561 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:32,561 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:32,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 21:58:32,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:32,779 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:32,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:32,780 INFO L85 PathProgramCache]: Analyzing trace with hash -241278758, now seen corresponding path program 21 times [2022-03-15 21:58:32,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:32,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19195927] [2022-03-15 21:58:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:32,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:32,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:32,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19195927] [2022-03-15 21:58:32,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19195927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:32,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130656481] [2022-03-15 21:58:32,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:58:32,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:32,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:32,992 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) [2022-03-15 21:58:33,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 21:58:33,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:58:33,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:58:33,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:58:33,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:33,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:33,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 84 [2022-03-15 21:58:33,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:33,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:33,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:33,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:33,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:33,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:33,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 137 [2022-03-15 21:58:35,348 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:35,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:37,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:37,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:37,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:37,932 INFO L353 Elim1Store]: treesize reduction 32, result has 77.3 percent of original size [2022-03-15 21:58:37,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 62 treesize of output 144 [2022-03-15 21:58:37,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:37,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 167 [2022-03-15 21:58:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:40,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130656481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:40,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:40,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-03-15 21:58:40,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1343115009] [2022-03-15 21:58:40,157 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:40,159 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:40,171 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 36 transitions. [2022-03-15 21:58:40,171 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:40,282 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11462#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:58:40,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:58:40,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:40,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:58:40,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:58:40,283 INFO L87 Difference]: Start difference. First operand 182 states and 432 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:40,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:40,488 INFO L93 Difference]: Finished difference Result 310 states and 723 transitions. [2022-03-15 21:58:40,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:58:40,488 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:58:40,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:40,489 INFO L225 Difference]: With dead ends: 310 [2022-03-15 21:58:40,489 INFO L226 Difference]: Without dead ends: 293 [2022-03-15 21:58:40,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:58:40,490 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:40,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:58:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-15 21:58:40,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 192. [2022-03-15 21:58:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.3769633507853403) internal successors, (454), 191 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 454 transitions. [2022-03-15 21:58:40,494 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 454 transitions. Word has length 24 [2022-03-15 21:58:40,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:40,494 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 454 transitions. [2022-03-15 21:58:40,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:40,494 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 454 transitions. [2022-03-15 21:58:40,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:58:40,494 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:40,494 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:40,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 21:58:40,707 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,SelfDestructingSolverStorable22 [2022-03-15 21:58:40,707 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:40,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1545898338, now seen corresponding path program 22 times [2022-03-15 21:58:40,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:40,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658280552] [2022-03-15 21:58:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:40,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:40,920 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:40,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:40,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658280552] [2022-03-15 21:58:40,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658280552] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:40,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649889184] [2022-03-15 21:58:40,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:58:40,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:40,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:40,921 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) [2022-03-15 21:58:40,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 21:58:40,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:58:40,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:58:40,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:58:40,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:41,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:41,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2022-03-15 21:58:41,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:41,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:41,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:41,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:41,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:41,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:41,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:41,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:41,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:41,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:41,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:41,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2022-03-15 21:58:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:41,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:42,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:42,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 91 [2022-03-15 21:58:42,441 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:58:42,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 157 treesize of output 231 [2022-03-15 21:58:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:45,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649889184] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:45,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:45,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 21:58:45,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1046493918] [2022-03-15 21:58:45,223 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:45,225 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:45,231 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 44 transitions. [2022-03-15 21:58:45,231 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:45,359 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12330#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:58:45,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:58:45,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:45,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:58:45,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:58:45,360 INFO L87 Difference]: Start difference. First operand 192 states and 454 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:45,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:45,532 INFO L93 Difference]: Finished difference Result 368 states and 855 transitions. [2022-03-15 21:58:45,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:58:45,533 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:58:45,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:45,534 INFO L225 Difference]: With dead ends: 368 [2022-03-15 21:58:45,534 INFO L226 Difference]: Without dead ends: 349 [2022-03-15 21:58:45,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:58:45,534 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:45,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:58:45,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-03-15 21:58:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 166. [2022-03-15 21:58:45,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.3878787878787877) internal successors, (394), 165 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:45,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 394 transitions. [2022-03-15 21:58:45,538 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 394 transitions. Word has length 24 [2022-03-15 21:58:45,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:45,538 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 394 transitions. [2022-03-15 21:58:45,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 394 transitions. [2022-03-15 21:58:45,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:58:45,539 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:45,539 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:45,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 21:58:45,751 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,SelfDestructingSolverStorable23 [2022-03-15 21:58:45,751 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:45,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:45,752 INFO L85 PathProgramCache]: Analyzing trace with hash 225072050, now seen corresponding path program 23 times [2022-03-15 21:58:45,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:45,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523037171] [2022-03-15 21:58:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:45,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:45,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:45,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523037171] [2022-03-15 21:58:45,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523037171] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:45,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176434193] [2022-03-15 21:58:45,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:58:45,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:45,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:45,979 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) [2022-03-15 21:58:45,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 21:58:46,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:58:46,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:58:46,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:58:46,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:46,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:46,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 84 [2022-03-15 21:58:46,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:46,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:46,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:46,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:46,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:46,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:46,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:46,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:46,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:46,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:46,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:46,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:46,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-03-15 21:58:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:46,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:47,357 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:58:47,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 77 treesize of output 191 [2022-03-15 21:58:47,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:47,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 180 [2022-03-15 21:58:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:50,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176434193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:58:50,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:58:50,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 21:58:50,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1593018185] [2022-03-15 21:58:50,320 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:58:50,322 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:58:50,327 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 52 transitions. [2022-03-15 21:58:50,327 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:58:50,584 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13203#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:58:50,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:58:50,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:58:50,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:58:50,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:58:50,585 INFO L87 Difference]: Start difference. First operand 166 states and 394 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:50,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:58:50,783 INFO L93 Difference]: Finished difference Result 331 states and 764 transitions. [2022-03-15 21:58:50,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:58:50,783 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:58:50,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:58:50,784 INFO L225 Difference]: With dead ends: 331 [2022-03-15 21:58:50,784 INFO L226 Difference]: Without dead ends: 308 [2022-03-15 21:58:50,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:58:50,785 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:58:50,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:58:50,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-15 21:58:50,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 156. [2022-03-15 21:58:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.3870967741935485) internal successors, (370), 155 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) [2022-03-15 21:58:50,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 370 transitions. [2022-03-15 21:58:50,789 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 370 transitions. Word has length 24 [2022-03-15 21:58:50,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:58:50,789 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 370 transitions. [2022-03-15 21:58:50,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:58:50,789 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 370 transitions. [2022-03-15 21:58:50,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:58:50,789 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:58:50,789 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:58:50,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 21:58:50,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:50,990 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:58:50,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:58:50,990 INFO L85 PathProgramCache]: Analyzing trace with hash 164233434, now seen corresponding path program 24 times [2022-03-15 21:58:50,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:58:50,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468249082] [2022-03-15 21:58:50,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:58:50,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:58:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:58:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:58:51,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:58:51,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468249082] [2022-03-15 21:58:51,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468249082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:58:51,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719493782] [2022-03-15 21:58:51,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:58:51,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:58:51,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:51,200 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) [2022-03-15 21:58:51,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 21:58:51,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:58:51,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:58:51,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:58:51,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:58:52,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:52,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 84 [2022-03-15 21:58:52,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:52,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:52,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:52,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:52,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:52,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:58:52,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:52,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 40 treesize of output 88 [2022-03-15 21:58:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:58:52,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:58:55,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:58:55,861 INFO L353 Elim1Store]: treesize reduction 76, result has 65.0 percent of original size [2022-03-15 21:58:55,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 73 treesize of output 179 [2022-03-15 21:58:55,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:58:55,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 178 [2022-03-15 21:59:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:00,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719493782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:00,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:00,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-03-15 21:59:00,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [158984064] [2022-03-15 21:59:00,142 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:00,144 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:00,149 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 36 transitions. [2022-03-15 21:59:00,149 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:00,242 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14022#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:59:00,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:59:00,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:00,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:59:00,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:59:00,243 INFO L87 Difference]: Start difference. First operand 156 states and 370 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:00,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:00,458 INFO L93 Difference]: Finished difference Result 284 states and 638 transitions. [2022-03-15 21:59:00,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:59:00,459 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:59:00,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:00,460 INFO L225 Difference]: With dead ends: 284 [2022-03-15 21:59:00,460 INFO L226 Difference]: Without dead ends: 244 [2022-03-15 21:59:00,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:59:00,460 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:00,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:59:00,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-15 21:59:00,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 171. [2022-03-15 21:59:00,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.388235294117647) internal successors, (406), 170 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:00,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 406 transitions. [2022-03-15 21:59:00,464 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 406 transitions. Word has length 24 [2022-03-15 21:59:00,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:00,464 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 406 transitions. [2022-03-15 21:59:00,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:00,464 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 406 transitions. [2022-03-15 21:59:00,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:59:00,464 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:00,464 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:00,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 21:59:00,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:00,672 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:00,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:00,672 INFO L85 PathProgramCache]: Analyzing trace with hash -385086414, now seen corresponding path program 25 times [2022-03-15 21:59:00,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:00,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195105838] [2022-03-15 21:59:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:00,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:59:00,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:00,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195105838] [2022-03-15 21:59:00,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195105838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:00,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380422911] [2022-03-15 21:59:00,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:59:00,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:00,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:00,907 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) [2022-03-15 21:59:00,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 21:59:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:00,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:59:00,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:01,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:01,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2022-03-15 21:59:01,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:01,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:01,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:01,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:01,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:01,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:01,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:01,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:01,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:01,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:01,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:01,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2022-03-15 21:59:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:01,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:02,310 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:59:02,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 190 [2022-03-15 21:59:02,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:02,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 179 [2022-03-15 21:59:05,638 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:05,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380422911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:05,639 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:05,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-15 21:59:05,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [327314005] [2022-03-15 21:59:05,639 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:05,641 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:05,647 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 52 transitions. [2022-03-15 21:59:05,647 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:05,888 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14821#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:59:05,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:59:05,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:05,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:59:05,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:59:05,889 INFO L87 Difference]: Start difference. First operand 171 states and 406 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:06,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:06,132 INFO L93 Difference]: Finished difference Result 494 states and 1157 transitions. [2022-03-15 21:59:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:59:06,132 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:59:06,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:06,134 INFO L225 Difference]: With dead ends: 494 [2022-03-15 21:59:06,134 INFO L226 Difference]: Without dead ends: 452 [2022-03-15 21:59:06,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:59:06,134 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:06,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 1 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:59:06,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-03-15 21:59:06,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 189. [2022-03-15 21:59:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.393617021276596) internal successors, (450), 188 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:06,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 450 transitions. [2022-03-15 21:59:06,138 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 450 transitions. Word has length 24 [2022-03-15 21:59:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:06,139 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 450 transitions. [2022-03-15 21:59:06,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:06,139 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 450 transitions. [2022-03-15 21:59:06,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:59:06,139 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:06,139 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:06,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 21:59:06,347 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,SelfDestructingSolverStorable26 [2022-03-15 21:59:06,347 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:06,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:06,347 INFO L85 PathProgramCache]: Analyzing trace with hash 530286430, now seen corresponding path program 26 times [2022-03-15 21:59:06,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:06,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045352808] [2022-03-15 21:59:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:06,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:59:06,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:06,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045352808] [2022-03-15 21:59:06,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045352808] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:06,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847794023] [2022-03-15 21:59:06,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:59:06,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:06,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:06,564 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) [2022-03-15 21:59:06,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 21:59:06,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:59:06,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:06,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:59:06,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:06,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:06,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2022-03-15 21:59:07,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:07,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:07,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:07,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:07,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:07,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:07,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:07,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:07,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:07,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:07,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:07,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:07,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:07,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2022-03-15 21:59:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:07,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:08,023 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:59:08,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 190 [2022-03-15 21:59:08,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:08,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 179 [2022-03-15 21:59:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:09,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847794023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:09,576 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:09,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2022-03-15 21:59:09,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2063274200] [2022-03-15 21:59:09,576 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:09,578 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:09,583 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2022-03-15 21:59:09,583 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:09,720 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [15870#(and (<= end (+ 2 start)) (<= (select queue start) v_old) ok (<= (select A i) (select queue (+ start 1))) (<= (select queue (+ start 1)) (select queue start)) (<= (+ 2 start) end)), 15869#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:59:09,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:59:09,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:09,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:59:09,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:59:09,721 INFO L87 Difference]: Start difference. First operand 189 states and 450 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:09,931 INFO L93 Difference]: Finished difference Result 381 states and 881 transitions. [2022-03-15 21:59:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:59:09,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:59:09,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:09,932 INFO L225 Difference]: With dead ends: 381 [2022-03-15 21:59:09,932 INFO L226 Difference]: Without dead ends: 348 [2022-03-15 21:59:09,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:59:09,933 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:09,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 1 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:59:09,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-03-15 21:59:09,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 210. [2022-03-15 21:59:09,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.411483253588517) internal successors, (504), 209 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:09,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 504 transitions. [2022-03-15 21:59:09,938 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 504 transitions. Word has length 24 [2022-03-15 21:59:09,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:09,940 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 504 transitions. [2022-03-15 21:59:09,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:09,940 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 504 transitions. [2022-03-15 21:59:09,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:59:09,941 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:09,941 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:09,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 21:59:10,152 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,SelfDestructingSolverStorable27 [2022-03-15 21:59:10,152 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:10,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:10,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1192290818, now seen corresponding path program 27 times [2022-03-15 21:59:10,153 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:10,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543635023] [2022-03-15 21:59:10,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:10,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:10,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:10,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543635023] [2022-03-15 21:59:10,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543635023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:10,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849659042] [2022-03-15 21:59:10,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:59:10,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:10,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:10,343 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) [2022-03-15 21:59:10,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 21:59:10,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:59:10,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:10,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:59:10,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:11,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:11,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2022-03-15 21:59:11,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:11,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:11,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:11,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:11,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:11,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:11,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 131 [2022-03-15 21:59:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:12,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:15,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:15,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:15,197 INFO L353 Elim1Store]: treesize reduction 32, result has 77.3 percent of original size [2022-03-15 21:59:15,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 62 treesize of output 144 [2022-03-15 21:59:15,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:15,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 167 [2022-03-15 21:59:18,440 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:18,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849659042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:18,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:18,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-03-15 21:59:18,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1884441579] [2022-03-15 21:59:18,440 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:18,442 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:18,447 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2022-03-15 21:59:18,447 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:18,596 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [16845#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start))), 16846#(and (<= end (+ 2 start)) (<= (select queue start) v_old) ok (<= (select A i) (select queue (+ start 1))) (<= (select queue (+ start 1)) (select queue start)) (<= (+ 2 start) end))] [2022-03-15 21:59:18,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:59:18,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:18,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:59:18,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:59:18,597 INFO L87 Difference]: Start difference. First operand 210 states and 504 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:18,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:18,811 INFO L93 Difference]: Finished difference Result 465 states and 1068 transitions. [2022-03-15 21:59:18,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:59:18,812 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:59:18,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:18,813 INFO L225 Difference]: With dead ends: 465 [2022-03-15 21:59:18,813 INFO L226 Difference]: Without dead ends: 410 [2022-03-15 21:59:18,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:59:18,814 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:18,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:59:18,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-03-15 21:59:18,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 242. [2022-03-15 21:59:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.4107883817427385) internal successors, (581), 241 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 581 transitions. [2022-03-15 21:59:18,818 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 581 transitions. Word has length 24 [2022-03-15 21:59:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:18,819 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 581 transitions. [2022-03-15 21:59:18,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 581 transitions. [2022-03-15 21:59:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:59:18,819 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:18,819 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:18,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 21:59:19,031 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,SelfDestructingSolverStorable28 [2022-03-15 21:59:19,032 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:19,032 INFO L85 PathProgramCache]: Analyzing trace with hash 105975194, now seen corresponding path program 28 times [2022-03-15 21:59:19,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:19,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582471986] [2022-03-15 21:59:19,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:19,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:19,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:19,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582471986] [2022-03-15 21:59:19,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582471986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:19,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683926526] [2022-03-15 21:59:19,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:59:19,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:19,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:19,277 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) [2022-03-15 21:59:19,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 21:59:19,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:59:19,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:19,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:59:19,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:19,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:19,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2022-03-15 21:59:19,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:19,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:19,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:19,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:19,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:19,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:19,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:19,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:19,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:19,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:19,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:19,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2022-03-15 21:59:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:19,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:20,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:20,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 91 [2022-03-15 21:59:20,774 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:59:20,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 157 treesize of output 231 [2022-03-15 21:59:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:23,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683926526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:23,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:23,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-03-15 21:59:23,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [842850009] [2022-03-15 21:59:23,684 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:23,686 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:23,691 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 36 transitions. [2022-03-15 21:59:23,691 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:23,780 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17970#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:59:23,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:59:23,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:23,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:59:23,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:59:23,781 INFO L87 Difference]: Start difference. First operand 242 states and 581 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:24,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:24,002 INFO L93 Difference]: Finished difference Result 479 states and 1148 transitions. [2022-03-15 21:59:24,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:59:24,002 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:59:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:24,004 INFO L225 Difference]: With dead ends: 479 [2022-03-15 21:59:24,004 INFO L226 Difference]: Without dead ends: 470 [2022-03-15 21:59:24,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:59:24,004 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:24,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 1 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:59:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-03-15 21:59:24,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 281. [2022-03-15 21:59:24,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.4107142857142856) internal successors, (675), 280 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:24,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 675 transitions. [2022-03-15 21:59:24,009 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 675 transitions. Word has length 24 [2022-03-15 21:59:24,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:24,010 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 675 transitions. [2022-03-15 21:59:24,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:24,010 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 675 transitions. [2022-03-15 21:59:24,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:59:24,010 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:24,010 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:24,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 21:59:24,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:24,229 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:24,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:24,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1893152290, now seen corresponding path program 29 times [2022-03-15 21:59:24,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:24,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890105498] [2022-03-15 21:59:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:24,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:24,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:24,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890105498] [2022-03-15 21:59:24,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890105498] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:24,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081703467] [2022-03-15 21:59:24,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:59:24,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:24,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:24,472 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) [2022-03-15 21:59:24,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 21:59:24,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:59:24,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:24,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:59:24,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:24,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:24,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 85 [2022-03-15 21:59:25,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:25,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:25,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:25,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:25,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:25,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:25,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:25,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:25,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:25,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:25,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-03-15 21:59:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:25,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:25,874 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:59:25,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 77 treesize of output 191 [2022-03-15 21:59:25,901 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:25,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 180 [2022-03-15 21:59:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:28,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081703467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:28,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:28,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-03-15 21:59:28,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [319722070] [2022-03-15 21:59:28,126 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:28,128 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:28,133 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 44 transitions. [2022-03-15 21:59:28,133 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:28,266 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19185#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:59:28,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:59:28,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:28,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:59:28,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:59:28,268 INFO L87 Difference]: Start difference. First operand 281 states and 675 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:28,498 INFO L93 Difference]: Finished difference Result 526 states and 1254 transitions. [2022-03-15 21:59:28,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:59:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:59:28,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:28,500 INFO L225 Difference]: With dead ends: 526 [2022-03-15 21:59:28,500 INFO L226 Difference]: Without dead ends: 508 [2022-03-15 21:59:28,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:59:28,501 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:28,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 1 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:59:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-03-15 21:59:28,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 267. [2022-03-15 21:59:28,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.417293233082707) internal successors, (643), 266 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:28,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 643 transitions. [2022-03-15 21:59:28,506 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 643 transitions. Word has length 24 [2022-03-15 21:59:28,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:28,506 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 643 transitions. [2022-03-15 21:59:28,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:28,506 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 643 transitions. [2022-03-15 21:59:28,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:59:28,507 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:28,507 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:28,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 21:59:28,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:28,711 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:28,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:28,712 INFO L85 PathProgramCache]: Analyzing trace with hash 572326002, now seen corresponding path program 30 times [2022-03-15 21:59:28,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:28,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136871000] [2022-03-15 21:59:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:28,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:28,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:28,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136871000] [2022-03-15 21:59:28,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136871000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:28,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281779407] [2022-03-15 21:59:28,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:59:28,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:28,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:28,983 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) [2022-03-15 21:59:28,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 21:59:29,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:59:29,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:29,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:59:29,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:29,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:29,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2022-03-15 21:59:29,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:29,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:29,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:29,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:29,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:29,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:29,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:29,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:29,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:29,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:29,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 66 treesize of output 148 [2022-03-15 21:59:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:32,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:33,697 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-15 21:59:33,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 97 [2022-03-15 21:59:33,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:33,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 128 [2022-03-15 21:59:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:34,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281779407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:34,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:34,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2022-03-15 21:59:34,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [28272203] [2022-03-15 21:59:34,347 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:34,349 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:34,354 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 52 transitions. [2022-03-15 21:59:34,354 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:34,603 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20425#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:59:34,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:59:34,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:34,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:59:34,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:59:34,604 INFO L87 Difference]: Start difference. First operand 267 states and 643 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:34,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:34,827 INFO L93 Difference]: Finished difference Result 483 states and 1153 transitions. [2022-03-15 21:59:34,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:59:34,827 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:59:34,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:34,828 INFO L225 Difference]: With dead ends: 483 [2022-03-15 21:59:34,828 INFO L226 Difference]: Without dead ends: 474 [2022-03-15 21:59:34,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:59:34,829 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:34,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:59:34,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-03-15 21:59:34,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 265. [2022-03-15 21:59:34,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.428030303030303) internal successors, (641), 264 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:34,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 641 transitions. [2022-03-15 21:59:34,833 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 641 transitions. Word has length 24 [2022-03-15 21:59:34,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:34,834 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 641 transitions. [2022-03-15 21:59:34,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:34,834 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 641 transitions. [2022-03-15 21:59:34,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:59:34,834 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:34,834 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:34,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 21:59:35,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:35,047 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:35,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:35,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1726384446, now seen corresponding path program 31 times [2022-03-15 21:59:35,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:35,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202151213] [2022-03-15 21:59:35,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:35,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:35,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:35,318 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:35,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:35,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202151213] [2022-03-15 21:59:35,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202151213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:35,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638725510] [2022-03-15 21:59:35,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:59:35,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:35,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:35,319 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) [2022-03-15 21:59:35,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 21:59:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:35,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:59:35,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:35,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:35,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2022-03-15 21:59:35,882 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 21:59:35,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 16 [2022-03-15 21:59:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:35,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:36,592 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:59:36,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 190 [2022-03-15 21:59:36,619 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:36,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 179 [2022-03-15 21:59:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:38,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638725510] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:38,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:38,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-15 21:59:38,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1788602965] [2022-03-15 21:59:38,204 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:38,206 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:38,212 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 60 transitions. [2022-03-15 21:59:38,212 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:38,592 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21609#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue (+ 3 start)) (select queue (+ 2 start))) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:59:38,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:59:38,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:38,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:59:38,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:59:38,593 INFO L87 Difference]: Start difference. First operand 265 states and 641 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:38,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:38,834 INFO L93 Difference]: Finished difference Result 493 states and 1177 transitions. [2022-03-15 21:59:38,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:59:38,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:59:38,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:38,836 INFO L225 Difference]: With dead ends: 493 [2022-03-15 21:59:38,836 INFO L226 Difference]: Without dead ends: 484 [2022-03-15 21:59:38,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:59:38,837 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:38,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:59:38,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-03-15 21:59:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 270. [2022-03-15 21:59:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.4275092936802976) internal successors, (653), 269 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 653 transitions. [2022-03-15 21:59:38,841 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 653 transitions. Word has length 24 [2022-03-15 21:59:38,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:38,842 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 653 transitions. [2022-03-15 21:59:38,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:38,842 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 653 transitions. [2022-03-15 21:59:38,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:59:38,842 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:38,842 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:38,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 21:59:39,043 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,SelfDestructingSolverStorable32 [2022-03-15 21:59:39,043 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:39,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:39,043 INFO L85 PathProgramCache]: Analyzing trace with hash 2068367090, now seen corresponding path program 32 times [2022-03-15 21:59:39,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:39,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890054327] [2022-03-15 21:59:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:39,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:59:39,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:39,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890054327] [2022-03-15 21:59:39,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890054327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:39,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644758373] [2022-03-15 21:59:39,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:59:39,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:39,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:39,092 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) [2022-03-15 21:59:39,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 21:59:39,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:59:39,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:39,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 21:59:39,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:59:39,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:59:39,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644758373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:39,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:39,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-15 21:59:39,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1886079797] [2022-03-15 21:59:39,209 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:39,211 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:39,217 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 38 transitions. [2022-03-15 21:59:39,217 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:39,246 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:59:39,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:59:39,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:39,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:59:39,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-15 21:59:39,247 INFO L87 Difference]: Start difference. First operand 270 states and 653 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:39,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:39,306 INFO L93 Difference]: Finished difference Result 451 states and 1044 transitions. [2022-03-15 21:59:39,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:59:39,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 21:59:39,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:39,308 INFO L225 Difference]: With dead ends: 451 [2022-03-15 21:59:39,308 INFO L226 Difference]: Without dead ends: 430 [2022-03-15 21:59:39,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-15 21:59:39,308 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:39,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:39,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-03-15 21:59:39,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 338. [2022-03-15 21:59:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.4451038575667656) internal successors, (824), 337 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:39,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 824 transitions. [2022-03-15 21:59:39,313 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 824 transitions. Word has length 26 [2022-03-15 21:59:39,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:39,313 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 824 transitions. [2022-03-15 21:59:39,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:39,313 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 824 transitions. [2022-03-15 21:59:39,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:59:39,314 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:39,314 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:39,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 21:59:39,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:39,530 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:39,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:39,530 INFO L85 PathProgramCache]: Analyzing trace with hash 23776897, now seen corresponding path program 33 times [2022-03-15 21:59:39,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:39,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454413155] [2022-03-15 21:59:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:39,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:39,774 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 21:59:39,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:39,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454413155] [2022-03-15 21:59:39,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454413155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:39,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687971754] [2022-03-15 21:59:39,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:59:39,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:39,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:39,776 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) [2022-03-15 21:59:39,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 21:59:39,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:59:39,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:39,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 21:59:39,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:40,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:40,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 126 [2022-03-15 21:59:41,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:41,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:41,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:41,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:41,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:41,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:41,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:41,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:41,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:41,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:41,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:41,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:41,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 75 treesize of output 221 [2022-03-15 21:59:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:46,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:00:00,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:00,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:00,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:00,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:00,608 INFO L353 Elim1Store]: treesize reduction 36, result has 80.5 percent of original size [2022-03-15 22:00:00,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 72 treesize of output 190 [2022-03-15 22:00:00,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:00,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 218 treesize of output 240 [2022-03-15 22:00:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:10,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687971754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:00:10,326 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:00:10,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 40 [2022-03-15 22:00:10,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1403882441] [2022-03-15 22:00:10,326 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:00:10,329 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:00:10,337 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 56 transitions. [2022-03-15 22:00:10,337 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:00:10,601 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24134#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:00:10,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:00:10,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:00:10,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:00:10,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1522, Unknown=3, NotChecked=0, Total=1806 [2022-03-15 22:00:10,603 INFO L87 Difference]: Start difference. First operand 338 states and 824 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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) [2022-03-15 22:00:10,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:00:10,898 INFO L93 Difference]: Finished difference Result 981 states and 2376 transitions. [2022-03-15 22:00:10,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 22:00:10,899 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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 28 [2022-03-15 22:00:10,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:00:10,902 INFO L225 Difference]: With dead ends: 981 [2022-03-15 22:00:10,902 INFO L226 Difference]: Without dead ends: 939 [2022-03-15 22:00:10,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=322, Invalid=1745, Unknown=3, NotChecked=0, Total=2070 [2022-03-15 22:00:10,903 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:00:10,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:00:10,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-03-15 22:00:10,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 292. [2022-03-15 22:00:10,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.457044673539519) internal successors, (715), 291 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:00:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 715 transitions. [2022-03-15 22:00:10,909 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 715 transitions. Word has length 28 [2022-03-15 22:00:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:00:10,909 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 715 transitions. [2022-03-15 22:00:10,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 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) [2022-03-15 22:00:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 715 transitions. [2022-03-15 22:00:10,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:00:10,910 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:00:10,910 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:00:10,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-15 22:00:11,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:11,126 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:00:11,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:00:11,127 INFO L85 PathProgramCache]: Analyzing trace with hash 939149741, now seen corresponding path program 34 times [2022-03-15 22:00:11,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:00:11,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333602776] [2022-03-15 22:00:11,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:00:11,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:00:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:00:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:00:11,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:00:11,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333602776] [2022-03-15 22:00:11,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333602776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:00:11,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012558634] [2022-03-15 22:00:11,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:00:11,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:11,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:00:11,398 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) [2022-03-15 22:00:11,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 22:00:11,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:00:11,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:00:11,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:00:11,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:00:12,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:12,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 128 [2022-03-15 22:00:12,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:12,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:12,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:12,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:12,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:12,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:12,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:12,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:12,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:12,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:12,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:12,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:12,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:12,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:12,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:12,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2022-03-15 22:00:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:12,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:00:13,956 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:00:13,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 97 treesize of output 287 [2022-03-15 22:00:14,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:14,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 272 treesize of output 292 [2022-03-15 22:00:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:17,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012558634] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:00:17,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:00:17,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 38 [2022-03-15 22:00:17,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [800470173] [2022-03-15 22:00:17,303 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:00:17,306 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:00:17,313 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2022-03-15 22:00:17,313 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:00:17,459 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [25909#(and (<= end (+ 2 start)) (<= (select queue start) v_old) ok (<= (select A i) (select queue (+ start 1))) (<= (select queue (+ start 1)) (select queue start)) (<= (+ 2 start) end)), 25908#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 22:00:17,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:00:17,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:00:17,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:00:17,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:00:17,460 INFO L87 Difference]: Start difference. First operand 292 states and 715 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 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) [2022-03-15 22:00:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:00:17,785 INFO L93 Difference]: Finished difference Result 472 states and 1089 transitions. [2022-03-15 22:00:17,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 22:00:17,786 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 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 28 [2022-03-15 22:00:17,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:00:17,787 INFO L225 Difference]: With dead ends: 472 [2022-03-15 22:00:17,787 INFO L226 Difference]: Without dead ends: 419 [2022-03-15 22:00:17,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=319, Invalid=1573, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:00:17,788 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:00:17,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:00:17,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-15 22:00:17,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 274. [2022-03-15 22:00:17,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.4358974358974357) internal successors, (665), 273 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:00:17,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 665 transitions. [2022-03-15 22:00:17,792 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 665 transitions. Word has length 28 [2022-03-15 22:00:17,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:00:17,792 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 665 transitions. [2022-03-15 22:00:17,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 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) [2022-03-15 22:00:17,792 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 665 transitions. [2022-03-15 22:00:17,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:00:17,793 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:00:17,793 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:00:17,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 22:00:18,008 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,SelfDestructingSolverStorable35 [2022-03-15 22:00:18,009 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:00:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:00:18,009 INFO L85 PathProgramCache]: Analyzing trace with hash 514838505, now seen corresponding path program 35 times [2022-03-15 22:00:18,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:00:18,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103241612] [2022-03-15 22:00:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:00:18,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:00:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:00:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:18,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:00:18,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103241612] [2022-03-15 22:00:18,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103241612] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:00:18,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743191213] [2022-03-15 22:00:18,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:00:18,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:18,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:00:18,306 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) [2022-03-15 22:00:18,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 22:00:18,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 22:00:18,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:00:18,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:00:18,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:00:18,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:18,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 128 [2022-03-15 22:00:19,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:19,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:19,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:19,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:19,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:19,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:19,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:19,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:19,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:19,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:19,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:19,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:19,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:19,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:19,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:19,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:19,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:19,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:19,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2022-03-15 22:00:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:19,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:00:20,718 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:00:20,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 97 treesize of output 287 [2022-03-15 22:00:20,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:20,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 272 treesize of output 292 [2022-03-15 22:00:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:29,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743191213] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:00:29,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:00:29,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-03-15 22:00:29,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1921875222] [2022-03-15 22:00:29,844 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:00:29,847 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:00:29,854 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 40 transitions. [2022-03-15 22:00:29,854 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:00:29,949 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27137#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 22:00:29,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:00:29,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:00:29,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:00:29,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:00:29,950 INFO L87 Difference]: Start difference. First operand 274 states and 665 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:00:30,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:00:30,222 INFO L93 Difference]: Finished difference Result 493 states and 1180 transitions. [2022-03-15 22:00:30,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:00:30,222 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:00:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:00:30,223 INFO L225 Difference]: With dead ends: 493 [2022-03-15 22:00:30,223 INFO L226 Difference]: Without dead ends: 476 [2022-03-15 22:00:30,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=331, Invalid=1561, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:00:30,224 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:00:30,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:00:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-15 22:00:30,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 294. [2022-03-15 22:00:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.426621160409556) internal successors, (711), 293 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:00:30,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 711 transitions. [2022-03-15 22:00:30,228 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 711 transitions. Word has length 28 [2022-03-15 22:00:30,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:00:30,229 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 711 transitions. [2022-03-15 22:00:30,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:00:30,229 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 711 transitions. [2022-03-15 22:00:30,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:00:30,229 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:00:30,229 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:00:30,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-15 22:00:30,439 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,SelfDestructingSolverStorable36 [2022-03-15 22:00:30,439 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:00:30,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:00:30,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1992951695, now seen corresponding path program 36 times [2022-03-15 22:00:30,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:00:30,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640315089] [2022-03-15 22:00:30,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:00:30,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:00:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:00:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:30,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:00:30,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640315089] [2022-03-15 22:00:30,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640315089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:00:30,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884636975] [2022-03-15 22:00:30,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:00:30,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:30,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:00:30,770 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) [2022-03-15 22:00:30,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 22:00:30,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 22:00:30,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:00:30,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:00:30,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:00:31,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:31,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 126 [2022-03-15 22:00:31,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:31,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:31,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:31,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:31,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:31,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:31,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:31,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:31,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:31,985 INFO L353 Elim1Store]: treesize reduction 30, result has 85.4 percent of original size [2022-03-15 22:00:31,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 75 treesize of output 201 [2022-03-15 22:00:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:36,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:00:50,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:50,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:50,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:50,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:50,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:50,197 INFO L353 Elim1Store]: treesize reduction 36, result has 80.5 percent of original size [2022-03-15 22:00:50,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 72 treesize of output 190 [2022-03-15 22:01:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:14,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884636975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:14,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:14,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 44 [2022-03-15 22:01:14,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1712529779] [2022-03-15 22:01:14,761 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:14,764 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:14,771 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 48 transitions. [2022-03-15 22:01:14,771 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:14,916 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28431#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:01:14,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:01:14,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:14,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:01:14,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1807, Unknown=2, NotChecked=0, Total=2162 [2022-03-15 22:01:14,918 INFO L87 Difference]: Start difference. First operand 294 states and 711 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:01:15,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:15,233 INFO L93 Difference]: Finished difference Result 629 states and 1501 transitions. [2022-03-15 22:01:15,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:01:15,234 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:01:15,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:15,236 INFO L225 Difference]: With dead ends: 629 [2022-03-15 22:01:15,236 INFO L226 Difference]: Without dead ends: 601 [2022-03-15 22:01:15,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=405, Invalid=2043, Unknown=2, NotChecked=0, Total=2450 [2022-03-15 22:01:15,236 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:15,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:01:15,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-03-15 22:01:15,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 274. [2022-03-15 22:01:15,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.421245421245421) internal successors, (661), 273 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:01:15,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 661 transitions. [2022-03-15 22:01:15,241 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 661 transitions. Word has length 28 [2022-03-15 22:01:15,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:15,241 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 661 transitions. [2022-03-15 22:01:15,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:01:15,241 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 661 transitions. [2022-03-15 22:01:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:01:15,242 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:15,242 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:15,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:15,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-15 22:01:15,442 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:15,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:15,442 INFO L85 PathProgramCache]: Analyzing trace with hash 981189313, now seen corresponding path program 37 times [2022-03-15 22:01:15,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:15,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934961489] [2022-03-15 22:01:15,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:15,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:15,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:15,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934961489] [2022-03-15 22:01:15,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934961489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:15,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18740055] [2022-03-15 22:01:15,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:01:15,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:15,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:15,759 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) [2022-03-15 22:01:15,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 22:01:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:15,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:01:15,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:16,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:16,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 128 [2022-03-15 22:01:16,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:16,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:16,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:16,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:16,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:16,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:16,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:16,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:16,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:16,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:16,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:16,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:16,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:16,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:16,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:16,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:16,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:16,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:16,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2022-03-15 22:01:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:16,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:18,284 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:01:18,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 97 treesize of output 287 [2022-03-15 22:01:18,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:18,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 272 treesize of output 292 [2022-03-15 22:01:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:23,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18740055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:23,900 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:23,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 22:01:23,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2032063816] [2022-03-15 22:01:23,900 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:23,902 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:23,910 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 56 transitions. [2022-03-15 22:01:23,910 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:24,160 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29816#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:01:24,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:01:24,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:24,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:01:24,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:01:24,161 INFO L87 Difference]: Start difference. First operand 274 states and 661 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:01:24,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:24,397 INFO L93 Difference]: Finished difference Result 574 states and 1370 transitions. [2022-03-15 22:01:24,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:01:24,397 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:01:24,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:24,399 INFO L225 Difference]: With dead ends: 574 [2022-03-15 22:01:24,399 INFO L226 Difference]: Without dead ends: 551 [2022-03-15 22:01:24,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=290, Invalid=1432, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:01:24,400 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:24,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:01:24,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-03-15 22:01:24,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 244. [2022-03-15 22:01:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.432098765432099) internal successors, (591), 243 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) [2022-03-15 22:01:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 591 transitions. [2022-03-15 22:01:24,404 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 591 transitions. Word has length 28 [2022-03-15 22:01:24,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:24,404 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 591 transitions. [2022-03-15 22:01:24,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:01:24,404 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 591 transitions. [2022-03-15 22:01:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:01:24,405 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:24,405 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:24,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:24,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 22:01:24,605 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:24,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:24,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1317521135, now seen corresponding path program 38 times [2022-03-15 22:01:24,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:24,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776401920] [2022-03-15 22:01:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:24,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:24,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:24,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776401920] [2022-03-15 22:01:24,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776401920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:24,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360099921] [2022-03-15 22:01:24,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:01:24,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:24,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:24,921 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) [2022-03-15 22:01:24,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 22:01:24,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:01:24,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:24,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 22:01:24,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:25,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:25,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 126 [2022-03-15 22:01:32,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:32,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:32,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:32,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:32,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:32,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:32,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:32,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:32,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:32,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:32,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 51 treesize of output 113 [2022-03-15 22:01:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:33,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:43,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:44,077 INFO L353 Elim1Store]: treesize reduction 156, result has 59.5 percent of original size [2022-03-15 22:01:44,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 94 treesize of output 276 [2022-03-15 22:01:44,148 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:44,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 271 treesize of output 291 [2022-03-15 22:02:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:02:01,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360099921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:01,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:01,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 42 [2022-03-15 22:02:01,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [253665438] [2022-03-15 22:02:01,104 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:01,106 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:01,115 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 64 transitions. [2022-03-15 22:02:01,115 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:01,547 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31089#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue (+ 3 start)) (select queue (+ 2 start))) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:02:01,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:02:01,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:01,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:02:01,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1641, Unknown=2, NotChecked=0, Total=1980 [2022-03-15 22:02:01,548 INFO L87 Difference]: Start difference. First operand 244 states and 591 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:02:01,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:01,844 INFO L93 Difference]: Finished difference Result 489 states and 1155 transitions. [2022-03-15 22:02:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:02:01,845 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:02:01,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:01,846 INFO L225 Difference]: With dead ends: 489 [2022-03-15 22:02:01,846 INFO L226 Difference]: Without dead ends: 462 [2022-03-15 22:02:01,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=361, Invalid=1799, Unknown=2, NotChecked=0, Total=2162 [2022-03-15 22:02:01,847 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:02:01,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 1 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:02:01,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-03-15 22:02:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 230. [2022-03-15 22:02:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.432314410480349) internal successors, (557), 229 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:02:01,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 557 transitions. [2022-03-15 22:02:01,852 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 557 transitions. Word has length 28 [2022-03-15 22:02:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:01,853 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 557 transitions. [2022-03-15 22:02:01,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:02:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 557 transitions. [2022-03-15 22:02:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:02:01,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:01,853 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:01,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 22:02:02,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 22:02:02,063 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:02,064 INFO L85 PathProgramCache]: Analyzing trace with hash 272044009, now seen corresponding path program 39 times [2022-03-15 22:02:02,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:02,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308352088] [2022-03-15 22:02:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:02,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:02:02,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:02,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308352088] [2022-03-15 22:02:02,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308352088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:02,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683947490] [2022-03-15 22:02:02,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:02:02,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:02,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:02,341 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) [2022-03-15 22:02:02,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 22:02:02,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 22:02:02,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:02,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:02:02,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:04,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:04,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 126 [2022-03-15 22:02:04,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:04,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:04,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:04,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:04,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:04,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:04,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:04,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:04,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:04,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:04,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:04,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:04,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:04,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:04,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:04,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:04,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:04,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:04,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 77 treesize of output 153 [2022-03-15 22:02:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:02:06,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:07,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:07,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:07,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:07,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:07,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:07,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:07,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:07,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:07,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:07,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:07,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:07,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:07,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:07,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:07,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:07,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:07,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:07,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:07,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:08,035 INFO L353 Elim1Store]: treesize reduction 22, result has 81.2 percent of original size [2022-03-15 22:02:08,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 94 treesize of output 142 [2022-03-15 22:02:08,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:08,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 149 treesize of output 189 [2022-03-15 22:02:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:02:10,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683947490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:10,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:10,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 40 [2022-03-15 22:02:10,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2137936406] [2022-03-15 22:02:10,312 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:10,314 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:10,321 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 40 transitions. [2022-03-15 22:02:10,321 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:10,430 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32247#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 22:02:10,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:02:10,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:10,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:02:10,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1468, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:02:10,431 INFO L87 Difference]: Start difference. First operand 230 states and 557 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:02:10,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:10,741 INFO L93 Difference]: Finished difference Result 435 states and 1004 transitions. [2022-03-15 22:02:10,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 22:02:10,741 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:02:10,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:10,742 INFO L225 Difference]: With dead ends: 435 [2022-03-15 22:02:10,742 INFO L226 Difference]: Without dead ends: 376 [2022-03-15 22:02:10,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=378, Invalid=1602, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:02:10,743 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:02:10,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:02:10,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-03-15 22:02:10,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 257. [2022-03-15 22:02:10,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.43359375) internal successors, (623), 256 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:02:10,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 623 transitions. [2022-03-15 22:02:10,750 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 623 transitions. Word has length 28 [2022-03-15 22:02:10,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:10,750 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 623 transitions. [2022-03-15 22:02:10,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:02:10,750 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 623 transitions. [2022-03-15 22:02:10,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:02:10,751 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:10,751 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:10,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-15 22:02:10,969 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,SelfDestructingSolverStorable40 [2022-03-15 22:02:10,969 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:10,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:10,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1618573871, now seen corresponding path program 40 times [2022-03-15 22:02:10,970 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:10,970 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808936783] [2022-03-15 22:02:10,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:10,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:02:11,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:11,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808936783] [2022-03-15 22:02:11,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808936783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:11,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940957877] [2022-03-15 22:02:11,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:02:11,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:11,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:11,298 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) [2022-03-15 22:02:11,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 22:02:11,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:02:11,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:11,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:02:11,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:11,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:11,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 128 [2022-03-15 22:02:12,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:12,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:12,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:12,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:12,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:12,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:12,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:12,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:12,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:12,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:12,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:12,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:12,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:12,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:12,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:12,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2022-03-15 22:02:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:02:12,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:13,675 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:13,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 134 [2022-03-15 22:02:14,046 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:02:14,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 237 treesize of output 357 [2022-03-15 22:02:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:02:24,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940957877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:24,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:24,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-03-15 22:02:24,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2105809901] [2022-03-15 22:02:24,347 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:24,350 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:24,358 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 64 transitions. [2022-03-15 22:02:24,358 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:24,746 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33401#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue (+ 3 start)) (select queue (+ 2 start))) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:02:24,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:02:24,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:24,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:02:24,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:02:24,747 INFO L87 Difference]: Start difference. First operand 257 states and 623 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:02:25,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:25,162 INFO L93 Difference]: Finished difference Result 816 states and 1947 transitions. [2022-03-15 22:02:25,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:02:25,162 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:02:25,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:25,164 INFO L225 Difference]: With dead ends: 816 [2022-03-15 22:02:25,164 INFO L226 Difference]: Without dead ends: 747 [2022-03-15 22:02:25,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:02:25,165 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:02:25,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 1 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:02:25,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-15 22:02:25,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 283. [2022-03-15 22:02:25,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.4361702127659575) internal successors, (687), 282 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:02:25,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 687 transitions. [2022-03-15 22:02:25,170 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 687 transitions. Word has length 28 [2022-03-15 22:02:25,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:25,170 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 687 transitions. [2022-03-15 22:02:25,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:02:25,170 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 687 transitions. [2022-03-15 22:02:25,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:02:25,170 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:25,170 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:25,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-15 22:02:25,371 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,SelfDestructingSolverStorable41 [2022-03-15 22:02:25,371 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:25,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:25,371 INFO L85 PathProgramCache]: Analyzing trace with hash 905320877, now seen corresponding path program 41 times [2022-03-15 22:02:25,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:25,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333246370] [2022-03-15 22:02:25,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:25,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:02:25,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:25,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333246370] [2022-03-15 22:02:25,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333246370] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:25,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353408663] [2022-03-15 22:02:25,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:02:25,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:25,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:25,736 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) [2022-03-15 22:02:25,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 22:02:25,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 22:02:25,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:25,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:02:25,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:26,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:26,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 137 [2022-03-15 22:02:27,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:27,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:27,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:27,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:27,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:27,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:27,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 30 [2022-03-15 22:02:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:02:27,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:28,814 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:28,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 135 [2022-03-15 22:02:28,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:28,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:28,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 238 treesize of output 286 [2022-03-15 22:02:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:02:30,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353408663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:30,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:30,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2022-03-15 22:02:30,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1626436045] [2022-03-15 22:02:30,841 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:30,857 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:30,864 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2022-03-15 22:02:30,864 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:31,113 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [34922#(or (not (< start end)) (and (<= (select queue start) v_old) ok)), 34996#(and (<= (select A i) (select queue (+ 2 start))) (<= (select queue start) v_old) (<= (select queue (+ 2 start)) (select queue (+ start 1))) ok (<= (+ 3 start) end) (<= (select queue (+ start 1)) (select queue start)) (<= end (+ 3 start)))] [2022-03-15 22:02:31,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:02:31,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:31,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:02:31,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1597, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:02:31,114 INFO L87 Difference]: Start difference. First operand 283 states and 687 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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) [2022-03-15 22:02:31,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:31,515 INFO L93 Difference]: Finished difference Result 561 states and 1327 transitions. [2022-03-15 22:02:31,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 22:02:31,515 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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 28 [2022-03-15 22:02:31,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:31,517 INFO L225 Difference]: With dead ends: 561 [2022-03-15 22:02:31,517 INFO L226 Difference]: Without dead ends: 510 [2022-03-15 22:02:31,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=410, Invalid=1660, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:02:31,517 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:02:31,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:02:31,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-03-15 22:02:31,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 318. [2022-03-15 22:02:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.451104100946372) internal successors, (777), 317 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:02:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 777 transitions. [2022-03-15 22:02:31,522 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 777 transitions. Word has length 28 [2022-03-15 22:02:31,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:31,522 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 777 transitions. [2022-03-15 22:02:31,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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) [2022-03-15 22:02:31,522 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 777 transitions. [2022-03-15 22:02:31,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:02:31,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:31,523 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:31,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 22:02:31,739 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,SelfDestructingSolverStorable42 [2022-03-15 22:02:31,739 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:31,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:31,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1194208867, now seen corresponding path program 42 times [2022-03-15 22:02:31,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:31,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926969763] [2022-03-15 22:02:31,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:31,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:02:32,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:32,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926969763] [2022-03-15 22:02:32,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926969763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:32,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25164085] [2022-03-15 22:02:32,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:02:32,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:32,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:32,043 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) [2022-03-15 22:02:32,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 22:02:32,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 22:02:32,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:32,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:02:32,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:34,334 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:34,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 126 [2022-03-15 22:02:34,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,718 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:34,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 18 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 18 case distinctions, treesize of input 88 treesize of output 220 [2022-03-15 22:02:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:02:39,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:53,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:53,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:53,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:53,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:53,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:53,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:53,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:53,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:53,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:53,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:53,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 61 treesize of output 123 [2022-03-15 22:02:53,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:53,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 147 treesize of output 183 [2022-03-15 22:02:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:02:54,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25164085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:54,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:54,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 39 [2022-03-15 22:02:54,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1797380633] [2022-03-15 22:02:54,032 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:54,035 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:54,041 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2022-03-15 22:02:54,042 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:54,300 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [36399#(and (<= (select A i) (select queue (+ 2 start))) (<= (select queue start) v_old) (<= (select queue (+ 2 start)) (select queue (+ start 1))) ok (<= (+ 3 start) end) (<= (select queue (+ start 1)) (select queue start)) (<= end (+ 3 start))), 36400#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 22:02:54,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:02:54,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:54,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:02:54,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1481, Unknown=4, NotChecked=0, Total=1806 [2022-03-15 22:02:54,301 INFO L87 Difference]: Start difference. First operand 318 states and 777 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:02:54,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:54,680 INFO L93 Difference]: Finished difference Result 682 states and 1600 transitions. [2022-03-15 22:02:54,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 22:02:54,680 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:02:54,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:54,682 INFO L225 Difference]: With dead ends: 682 [2022-03-15 22:02:54,682 INFO L226 Difference]: Without dead ends: 604 [2022-03-15 22:02:54,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=346, Invalid=1542, Unknown=4, NotChecked=0, Total=1892 [2022-03-15 22:02:54,683 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:02:54,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:02:54,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-03-15 22:02:54,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 368. [2022-03-15 22:02:54,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.446866485013624) internal successors, (898), 367 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:02:54,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 898 transitions. [2022-03-15 22:02:54,688 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 898 transitions. Word has length 28 [2022-03-15 22:02:54,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:54,688 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 898 transitions. [2022-03-15 22:02:54,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:02:54,688 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 898 transitions. [2022-03-15 22:02:54,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:02:54,689 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:54,689 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:54,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 22:02:54,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:54,899 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:54,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:54,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1164116201, now seen corresponding path program 43 times [2022-03-15 22:02:54,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:54,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179474124] [2022-03-15 22:02:54,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:54,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:02:55,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:55,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179474124] [2022-03-15 22:02:55,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179474124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:55,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679285451] [2022-03-15 22:02:55,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:02:55,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:55,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:55,278 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) [2022-03-15 22:02:55,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 22:02:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:55,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:02:55,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:55,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:55,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 129 [2022-03-15 22:02:56,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:56,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:56,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:56,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:56,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:56,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:56,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:56,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:56,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:56,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:56,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:56,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:56,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:56,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:56,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:56,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:56,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:56,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2022-03-15 22:02:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:02:56,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:57,980 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:02:57,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 97 treesize of output 287 [2022-03-15 22:02:58,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:58,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 272 treesize of output 292 [2022-03-15 22:03:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:03:04,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679285451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:03:04,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:03:04,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 41 [2022-03-15 22:03:04,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [770635531] [2022-03-15 22:03:04,630 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:03:04,632 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:03:04,639 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 40 transitions. [2022-03-15 22:03:04,639 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:03:04,737 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38026#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 22:03:04,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:03:04,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:03:04,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:03:04,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:03:04,738 INFO L87 Difference]: Start difference. First operand 368 states and 898 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:03:05,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:03:05,128 INFO L93 Difference]: Finished difference Result 682 states and 1659 transitions. [2022-03-15 22:03:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:03:05,128 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:03:05,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:03:05,130 INFO L225 Difference]: With dead ends: 682 [2022-03-15 22:03:05,130 INFO L226 Difference]: Without dead ends: 673 [2022-03-15 22:03:05,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=356, Invalid=1624, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:03:05,130 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:03:05,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 1 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:03:05,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-03-15 22:03:05,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 431. [2022-03-15 22:03:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.437209302325581) internal successors, (1048), 430 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:03:05,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1048 transitions. [2022-03-15 22:03:05,136 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1048 transitions. Word has length 28 [2022-03-15 22:03:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:03:05,137 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1048 transitions. [2022-03-15 22:03:05,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:03:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1048 transitions. [2022-03-15 22:03:05,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:03:05,137 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:03:05,137 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:03:05,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 22:03:05,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:03:05,347 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:03:05,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:03:05,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1343673999, now seen corresponding path program 44 times [2022-03-15 22:03:05,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:03:05,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886700495] [2022-03-15 22:03:05,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:03:05,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:03:05,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:03:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:03:05,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:03:05,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886700495] [2022-03-15 22:03:05,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886700495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:03:05,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131886137] [2022-03-15 22:03:05,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:03:05,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:03:05,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:03:05,742 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) [2022-03-15 22:03:05,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 22:03:05,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:03:05,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:03:05,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 22:03:05,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:03:06,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:06,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 127 [2022-03-15 22:03:09,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:09,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:09,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:09,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:09,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:09,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:09,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:09,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:09,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 51 treesize of output 113 [2022-03-15 22:03:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:03:10,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:03:19,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:20,214 INFO L353 Elim1Store]: treesize reduction 156, result has 59.5 percent of original size [2022-03-15 22:03:20,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 94 treesize of output 276 [2022-03-15 22:03:20,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:20,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 271 treesize of output 291 [2022-03-15 22:04:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:04:01,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131886137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:04:01,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:04:01,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 44 [2022-03-15 22:04:01,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1591216376] [2022-03-15 22:04:01,335 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:04:01,338 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:04:01,345 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 48 transitions. [2022-03-15 22:04:01,345 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:04:01,493 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39781#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:04:01,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:04:01,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:04:01,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:04:01,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1762, Unknown=1, NotChecked=0, Total=2162 [2022-03-15 22:04:01,494 INFO L87 Difference]: Start difference. First operand 431 states and 1048 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:04:01,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:04:01,886 INFO L93 Difference]: Finished difference Result 750 states and 1817 transitions. [2022-03-15 22:04:01,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:04:01,887 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:04:01,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:04:01,889 INFO L225 Difference]: With dead ends: 750 [2022-03-15 22:04:01,890 INFO L226 Difference]: Without dead ends: 732 [2022-03-15 22:04:01,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=459, Invalid=1892, Unknown=1, NotChecked=0, Total=2352 [2022-03-15 22:04:01,890 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:04:01,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:04:01,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-03-15 22:04:01,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 405. [2022-03-15 22:04:01,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.4405940594059405) internal successors, (986), 404 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:04:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 986 transitions. [2022-03-15 22:04:01,896 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 986 transitions. Word has length 28 [2022-03-15 22:04:01,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:04:01,896 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 986 transitions. [2022-03-15 22:04:01,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:04:01,897 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 986 transitions. [2022-03-15 22:04:01,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:04:01,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:04:01,897 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:04:01,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-15 22:04:02,111 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,SelfDestructingSolverStorable45 [2022-03-15 22:04:02,111 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:04:02,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:04:02,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1630467009, now seen corresponding path program 45 times [2022-03-15 22:04:02,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:04:02,113 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510258827] [2022-03-15 22:04:02,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:04:02,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:04:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:04:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:04:02,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:04:02,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510258827] [2022-03-15 22:04:02,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510258827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:04:02,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133368179] [2022-03-15 22:04:02,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:04:02,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:04:02,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:04:02,549 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) [2022-03-15 22:04:02,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 22:04:02,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 22:04:02,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:04:02,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 22:04:02,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:04:03,272 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:03,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 127 [2022-03-15 22:04:04,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:04,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:04,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:04,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:04,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:04,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:04,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:04,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:04,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:04,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 64 treesize of output 186 [2022-03-15 22:04:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:04:07,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:04:14,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:14,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:14,279 INFO L353 Elim1Store]: treesize reduction 88, result has 69.1 percent of original size [2022-03-15 22:04:14,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 83 treesize of output 241 [2022-03-15 22:04:14,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:14,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 267 treesize of output 283 [2022-03-15 22:04:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:04:48,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133368179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:04:48,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:04:48,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 44 [2022-03-15 22:04:48,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1060427442] [2022-03-15 22:04:48,421 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:04:48,423 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:04:48,431 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 56 transitions. [2022-03-15 22:04:48,431 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:04:48,698 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41554#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:04:48,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:04:48,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:04:48,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:04:48,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1769, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:04:48,698 INFO L87 Difference]: Start difference. First operand 405 states and 986 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:04:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:04:49,022 INFO L93 Difference]: Finished difference Result 705 states and 1714 transitions. [2022-03-15 22:04:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:04:49,022 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:04:49,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:04:49,024 INFO L225 Difference]: With dead ends: 705 [2022-03-15 22:04:49,024 INFO L226 Difference]: Without dead ends: 696 [2022-03-15 22:04:49,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=415, Invalid=1841, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 22:04:49,025 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:04:49,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 1 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:04:49,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-03-15 22:04:49,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 397. [2022-03-15 22:04:49,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.4494949494949494) internal successors, (970), 396 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:04:49,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 970 transitions. [2022-03-15 22:04:49,030 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 970 transitions. Word has length 28 [2022-03-15 22:04:49,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:04:49,031 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 970 transitions. [2022-03-15 22:04:49,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:04:49,031 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 970 transitions. [2022-03-15 22:04:49,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:04:49,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:04:49,031 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:04:49,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 22:04:49,236 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,SelfDestructingSolverStorable46 [2022-03-15 22:04:49,236 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:04:49,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:04:49,237 INFO L85 PathProgramCache]: Analyzing trace with hash -668243439, now seen corresponding path program 46 times [2022-03-15 22:04:49,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:04:49,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366605255] [2022-03-15 22:04:49,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:04:49,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:04:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:04:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:04:49,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:04:49,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366605255] [2022-03-15 22:04:49,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366605255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:04:49,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545925966] [2022-03-15 22:04:49,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:04:49,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:04:49,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:04:49,663 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) [2022-03-15 22:04:49,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 22:04:49,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:04:49,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:04:49,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:04:49,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:04:50,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:50,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 129 [2022-03-15 22:04:50,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:50,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:50,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2022-03-15 22:04:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:04:50,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:04:51,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:51,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 134 [2022-03-15 22:04:52,329 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:04:52,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 237 treesize of output 357 [2022-03-15 22:04:57,791 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:04:57,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545925966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:04:57,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:04:57,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 38 [2022-03-15 22:04:57,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1942000116] [2022-03-15 22:04:57,792 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:04:57,795 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:04:57,802 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 64 transitions. [2022-03-15 22:04:57,803 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:04:58,200 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43258#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue (+ 3 start)) (select queue (+ 2 start))) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:04:58,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:04:58,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:04:58,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:04:58,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1360, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:04:58,201 INFO L87 Difference]: Start difference. First operand 397 states and 970 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:04:58,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:04:58,530 INFO L93 Difference]: Finished difference Result 673 states and 1632 transitions. [2022-03-15 22:04:58,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:04:58,531 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:04:58,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:04:58,533 INFO L225 Difference]: With dead ends: 673 [2022-03-15 22:04:58,533 INFO L226 Difference]: Without dead ends: 664 [2022-03-15 22:04:58,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=296, Invalid=1426, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:04:58,533 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:04:58,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:04:58,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-03-15 22:04:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 395. [2022-03-15 22:04:58,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.4568527918781724) internal successors, (968), 394 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:04:58,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 968 transitions. [2022-03-15 22:04:58,539 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 968 transitions. Word has length 28 [2022-03-15 22:04:58,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:04:58,539 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 968 transitions. [2022-03-15 22:04:58,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:04:58,540 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 968 transitions. [2022-03-15 22:04:58,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:04:58,540 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:04:58,540 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:04:58,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-15 22:04:58,758 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,SelfDestructingSolverStorable47 [2022-03-15 22:04:58,758 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:04:58,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:04:58,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2115793823, now seen corresponding path program 47 times [2022-03-15 22:04:58,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:04:58,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228889087] [2022-03-15 22:04:58,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:04:58,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:04:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:04:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:04:59,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:04:59,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228889087] [2022-03-15 22:04:59,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228889087] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:04:59,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668127086] [2022-03-15 22:04:59,146 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:04:59,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:04:59,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:04:59,147 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) [2022-03-15 22:04:59,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 22:04:59,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 22:04:59,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:04:59,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:04:59,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:04:59,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:59,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 127 [2022-03-15 22:05:00,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:00,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:00,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:00,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:00,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:00,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:00,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:00,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:00,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:00,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:00,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:00,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:00,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:00,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:00,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 19 [2022-03-15 22:05:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:05:00,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:05:01,811 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:01,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 135 [2022-03-15 22:05:01,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:01,904 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:01,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 238 treesize of output 286 [2022-03-15 22:05:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:05:02,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668127086] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:05:02,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:05:02,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 43 [2022-03-15 22:05:02,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1239274403] [2022-03-15 22:05:02,516 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:05:02,519 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:05:02,527 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 72 transitions. [2022-03-15 22:05:02,527 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:05:03,125 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [44931#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue (+ start 4)) (select queue (+ 3 start))) (not (< start end))) (or (<= (select queue (+ 3 start)) (select queue (+ 2 start))) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:05:03,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:05:03,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:05:03,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:05:03,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1579, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:05:03,126 INFO L87 Difference]: Start difference. First operand 395 states and 968 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:05:03,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:05:03,492 INFO L93 Difference]: Finished difference Result 683 states and 1656 transitions. [2022-03-15 22:05:03,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:05:03,492 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:05:03,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:05:03,494 INFO L225 Difference]: With dead ends: 683 [2022-03-15 22:05:03,494 INFO L226 Difference]: Without dead ends: 674 [2022-03-15 22:05:03,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=513, Invalid=1649, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:05:03,495 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:05:03,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:05:03,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-03-15 22:05:03,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 400. [2022-03-15 22:05:03,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.456140350877193) internal successors, (980), 399 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:05:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 980 transitions. [2022-03-15 22:05:03,501 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 980 transitions. Word has length 28 [2022-03-15 22:05:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:05:03,501 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 980 transitions. [2022-03-15 22:05:03,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:05:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 980 transitions. [2022-03-15 22:05:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 22:05:03,502 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:05:03,502 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:05:03,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 22:05:03,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:05:03,715 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:05:03,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:05:03,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1034625665, now seen corresponding path program 48 times [2022-03-15 22:05:03,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:05:03,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966736184] [2022-03-15 22:05:03,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:05:03,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:05:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:05:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 41 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:05:03,765 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:05:03,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966736184] [2022-03-15 22:05:03,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966736184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:05:03,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427583151] [2022-03-15 22:05:03,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:05:03,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:05:03,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:05:03,766 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) [2022-03-15 22:05:03,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 22:05:03,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 22:05:03,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:05:03,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 22:05:03,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:05:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 41 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:05:03,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:05:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 41 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:05:03,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427583151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:05:03,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:05:03,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-15 22:05:03,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [598350781] [2022-03-15 22:05:03,885 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:05:03,888 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:05:03,896 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 42 transitions. [2022-03-15 22:05:03,896 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:05:03,916 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:05:03,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 22:05:03,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:05:03,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 22:05:03,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-15 22:05:03,916 INFO L87 Difference]: Start difference. First operand 400 states and 980 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:05:03,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:05:03,983 INFO L93 Difference]: Finished difference Result 659 states and 1558 transitions. [2022-03-15 22:05:03,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 22:05:03,983 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 22:05:03,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:05:03,985 INFO L225 Difference]: With dead ends: 659 [2022-03-15 22:05:03,985 INFO L226 Difference]: Without dead ends: 634 [2022-03-15 22:05:03,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-15 22:05:03,985 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:05:03,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:05:03,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-03-15 22:05:03,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 486. [2022-03-15 22:05:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.468041237113402) internal successors, (1197), 485 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:05:03,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1197 transitions. [2022-03-15 22:05:03,991 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1197 transitions. Word has length 30 [2022-03-15 22:05:03,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:05:03,991 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1197 transitions. [2022-03-15 22:05:03,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:05:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1197 transitions. [2022-03-15 22:05:03,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:05:03,992 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:05:03,992 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:05:04,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 22:05:04,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 22:05:04,195 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:05:04,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:05:04,196 INFO L85 PathProgramCache]: Analyzing trace with hash 185436320, now seen corresponding path program 49 times [2022-03-15 22:05:04,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:05:04,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144071027] [2022-03-15 22:05:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:05:04,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:05:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:05:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:05:04,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:05:04,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144071027] [2022-03-15 22:05:04,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144071027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:05:04,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226152634] [2022-03-15 22:05:04,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:05:04,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:05:04,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:05:04,613 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) [2022-03-15 22:05:04,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 22:05:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:05:04,642 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:05:04,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:05:05,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:05,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 178 [2022-03-15 22:05:06,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:06,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:06,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:06,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 22 [2022-03-15 22:05:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:05:06,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:05:09,128 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:05:09,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 118 treesize of output 404 [2022-03-15 22:05:09,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:09,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 397 treesize of output 433 [2022-03-15 22:05:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:05:44,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226152634] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:05:44,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:05:44,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 43 [2022-03-15 22:05:44,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1257230370] [2022-03-15 22:05:44,048 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:05:44,052 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:05:44,063 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 68 transitions. [2022-03-15 22:05:44,063 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:05:44,507 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [48462#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue (+ 3 start)) (select queue (+ 2 start))) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:05:44,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:05:44,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:05:44,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:05:44,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:05:44,507 INFO L87 Difference]: Start difference. First operand 486 states and 1197 transitions. Second operand has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:05:44,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:05:44,978 INFO L93 Difference]: Finished difference Result 1635 states and 4004 transitions. [2022-03-15 22:05:44,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:05:44,978 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 22:05:44,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:05:44,982 INFO L225 Difference]: With dead ends: 1635 [2022-03-15 22:05:44,982 INFO L226 Difference]: Without dead ends: 1566 [2022-03-15 22:05:44,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=353, Invalid=2097, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 22:05:44,982 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:05:44,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:05:44,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2022-03-15 22:05:44,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 408. [2022-03-15 22:05:44,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.481572481572482) internal successors, (1010), 407 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:05:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1010 transitions. [2022-03-15 22:05:44,991 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1010 transitions. Word has length 32 [2022-03-15 22:05:44,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:05:44,991 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1010 transitions. [2022-03-15 22:05:44,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:05:44,991 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1010 transitions. [2022-03-15 22:05:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:05:44,992 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:05:44,992 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:05:45,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 22:05:45,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:05:45,195 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:05:45,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:05:45,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1585636228, now seen corresponding path program 50 times [2022-03-15 22:05:45,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:05:45,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616159152] [2022-03-15 22:05:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:05:45,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:05:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:05:45,646 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:05:45,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:05:45,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616159152] [2022-03-15 22:05:45,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616159152] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:05:45,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935112274] [2022-03-15 22:05:45,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:05:45,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:05:45,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:05:45,648 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) [2022-03-15 22:05:45,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 22:05:45,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:05:45,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:05:45,680 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:05:45,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:05:46,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:46,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 178 [2022-03-15 22:05:47,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:47,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:47,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:47,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 22 [2022-03-15 22:05:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:05:47,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:05:49,619 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:49,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 185 [2022-03-15 22:05:50,250 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:05:50,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 333 treesize of output 511 [2022-03-15 22:06:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:06:10,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935112274] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:06:10,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:06:10,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 47 [2022-03-15 22:06:10,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2055269326] [2022-03-15 22:06:10,924 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:06:10,927 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:06:10,936 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2022-03-15 22:06:10,936 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:06:11,120 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [51157#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start))), 51158#(and (<= (select A i) (select queue (+ 2 start))) (<= (select queue start) v_old) (<= (select queue (+ 2 start)) (select queue (+ start 1))) ok (<= (+ 3 start) end) (<= (select queue (+ start 1)) (select queue start)) (<= end (+ 3 start)))] [2022-03-15 22:06:11,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:06:11,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:06:11,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:06:11,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=2179, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:06:11,121 INFO L87 Difference]: Start difference. First operand 408 states and 1010 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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) [2022-03-15 22:06:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:06:11,645 INFO L93 Difference]: Finished difference Result 919 states and 2196 transitions. [2022-03-15 22:06:11,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:06:11,645 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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 32 [2022-03-15 22:06:11,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:06:11,647 INFO L225 Difference]: With dead ends: 919 [2022-03-15 22:06:11,647 INFO L226 Difference]: Without dead ends: 833 [2022-03-15 22:06:11,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=429, Invalid=2433, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:06:11,648 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:06:11,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:06:11,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-03-15 22:06:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 515. [2022-03-15 22:06:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.4863813229571985) internal successors, (1278), 514 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:06:11,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1278 transitions. [2022-03-15 22:06:11,655 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1278 transitions. Word has length 32 [2022-03-15 22:06:11,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:06:11,655 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1278 transitions. [2022-03-15 22:06:11,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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) [2022-03-15 22:06:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1278 transitions. [2022-03-15 22:06:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:06:11,656 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:06:11,656 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:06:11,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 22:06:11,856 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,SelfDestructingSolverStorable51 [2022-03-15 22:06:11,856 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:06:11,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:06:11,856 INFO L85 PathProgramCache]: Analyzing trace with hash 609801324, now seen corresponding path program 51 times [2022-03-15 22:06:11,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:06:11,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341941745] [2022-03-15 22:06:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:06:11,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:06:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:06:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:06:12,201 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:06:12,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341941745] [2022-03-15 22:06:12,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341941745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:06:12,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387176804] [2022-03-15 22:06:12,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:06:12,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:06:12,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:06:12,202 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) [2022-03-15 22:06:12,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 22:06:12,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 22:06:12,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:06:12,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:06:12,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:06:31,438 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:06:31,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 176 [2022-03-15 22:06:32,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:32,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:32,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:32,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:32,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:32,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:32,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:32,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:32,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:32,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:32,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:32,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:32,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:32,356 INFO L353 Elim1Store]: treesize reduction 44, result has 83.4 percent of original size [2022-03-15 22:06:32,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 12 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 86 treesize of output 250 [2022-03-15 22:06:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:06:40,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:07:23,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:07:23,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:07:23,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:07:23,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:07:23,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:23,657 INFO L353 Elim1Store]: treesize reduction 108, result has 69.4 percent of original size [2022-03-15 22:07:23,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 39 case distinctions, treesize of input 93 treesize of output 295 [2022-03-15 22:07:23,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:07:23,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 336 treesize of output 374 [2022-03-15 22:07:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:07:53,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387176804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:07:53,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:07:53,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 19] total 46 [2022-03-15 22:07:53,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [291650341] [2022-03-15 22:07:53,391 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:07:53,393 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:07:53,402 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2022-03-15 22:07:53,402 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:07:53,628 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [53348#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start))), 53349#(and (<= (select A i) (select queue (+ 2 start))) (<= (select queue start) v_old) (<= (select queue (+ 2 start)) (select queue (+ start 1))) ok (<= (+ 3 start) end) (<= (select queue (+ start 1)) (select queue start)) (<= end (+ 3 start)))] [2022-03-15 22:07:53,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:07:53,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:07:53,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:07:53,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=2038, Unknown=15, NotChecked=0, Total=2450 [2022-03-15 22:07:53,629 INFO L87 Difference]: Start difference. First operand 515 states and 1278 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:07:54,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:07:54,081 INFO L93 Difference]: Finished difference Result 782 states and 1853 transitions. [2022-03-15 22:07:54,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:07:54,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 22:07:54,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:07:54,083 INFO L225 Difference]: With dead ends: 782 [2022-03-15 22:07:54,083 INFO L226 Difference]: Without dead ends: 706 [2022-03-15 22:07:54,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 55.2s TimeCoverageRelationStatistics Valid=442, Invalid=2195, Unknown=15, NotChecked=0, Total=2652 [2022-03-15 22:07:54,084 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:07:54,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:07:54,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-03-15 22:07:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 386. [2022-03-15 22:07:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.4675324675324677) internal successors, (950), 385 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:07:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 950 transitions. [2022-03-15 22:07:54,089 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 950 transitions. Word has length 32 [2022-03-15 22:07:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:07:54,089 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 950 transitions. [2022-03-15 22:07:54,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:07:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 950 transitions. [2022-03-15 22:07:54,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:07:54,090 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:07:54,090 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:07:54,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 22:07:54,290 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,SelfDestructingSolverStorable52 [2022-03-15 22:07:54,290 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:07:54,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:07:54,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1326840904, now seen corresponding path program 52 times [2022-03-15 22:07:54,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:07:54,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827720755] [2022-03-15 22:07:54,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:07:54,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:07:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:07:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:07:54,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:07:54,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827720755] [2022-03-15 22:07:54,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827720755] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:07:54,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674012916] [2022-03-15 22:07:54,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:07:54,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:07:54,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:07:54,718 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) [2022-03-15 22:07:54,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 22:07:54,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:07:54,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:07:54,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:07:54,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:07:55,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:07:55,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 178 [2022-03-15 22:07:56,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:07:56,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:07:56,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 22 [2022-03-15 22:07:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:07:56,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:07:59,501 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:07:59,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 118 treesize of output 404 [2022-03-15 22:07:59,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:07:59,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 397 treesize of output 433 [2022-03-15 22:08:23,100 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:08:23,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674012916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:08:23,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:08:23,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 48 [2022-03-15 22:08:23,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [388327597] [2022-03-15 22:08:23,100 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:08:23,103 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:08:23,112 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 44 transitions. [2022-03-15 22:08:23,112 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:08:23,222 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [55144#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 22:08:23,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:08:23,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:08:23,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:08:23,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=2160, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:08:23,223 INFO L87 Difference]: Start difference. First operand 386 states and 950 transitions. Second operand has 20 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) [2022-03-15 22:08:23,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:08:23,666 INFO L93 Difference]: Finished difference Result 718 states and 1745 transitions. [2022-03-15 22:08:23,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:08:23,667 INFO L78 Accepts]: Start accepts. Automaton has has 20 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 32 [2022-03-15 22:08:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:08:23,668 INFO L225 Difference]: With dead ends: 718 [2022-03-15 22:08:23,668 INFO L226 Difference]: Without dead ends: 701 [2022-03-15 22:08:23,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=440, Invalid=2316, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:08:23,669 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:08:23,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 1 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:08:23,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-03-15 22:08:23,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 418. [2022-03-15 22:08:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.4556354916067145) internal successors, (1024), 417 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:08:23,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1024 transitions. [2022-03-15 22:08:23,674 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1024 transitions. Word has length 32 [2022-03-15 22:08:23,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:08:23,675 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1024 transitions. [2022-03-15 22:08:23,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 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) [2022-03-15 22:08:23,675 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1024 transitions. [2022-03-15 22:08:23,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:08:23,675 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:08:23,675 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:08:23,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 22:08:23,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:08:23,902 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:08:23,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:08:23,903 INFO L85 PathProgramCache]: Analyzing trace with hash 460336192, now seen corresponding path program 53 times [2022-03-15 22:08:23,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:08:23,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708696364] [2022-03-15 22:08:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:08:23,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:08:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:08:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:08:24,355 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:08:24,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708696364] [2022-03-15 22:08:24,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708696364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:08:24,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624324797] [2022-03-15 22:08:24,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:08:24,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:08:24,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:08:24,357 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) [2022-03-15 22:08:24,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 22:08:24,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 22:08:24,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:08:24,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-15 22:08:24,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:08:25,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:08:25,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 176 [2022-03-15 22:08:26,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:08:26,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:26,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:08:26,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 22 [2022-03-15 22:08:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:08:26,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:08:29,086 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:08:29,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 119 treesize of output 405 [2022-03-15 22:08:29,178 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:08:29,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 398 treesize of output 434 [2022-03-15 22:08:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:08:48,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624324797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:08:48,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:08:48,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2022-03-15 22:08:48,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1875939815] [2022-03-15 22:08:48,403 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:08:48,417 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:08:48,426 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 52 transitions. [2022-03-15 22:08:48,426 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:08:48,584 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [56938#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:08:48,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:08:48,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:08:48,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:08:48,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=2075, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 22:08:48,585 INFO L87 Difference]: Start difference. First operand 418 states and 1024 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:08:49,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:08:49,123 INFO L93 Difference]: Finished difference Result 1374 states and 3346 transitions. [2022-03-15 22:08:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:08:49,124 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 22:08:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:08:49,126 INFO L225 Difference]: With dead ends: 1374 [2022-03-15 22:08:49,126 INFO L226 Difference]: Without dead ends: 1346 [2022-03-15 22:08:49,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=456, Invalid=2406, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:08:49,131 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:08:49,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 1 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:08:49,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-03-15 22:08:49,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 513. [2022-03-15 22:08:49,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 2.4453125) internal successors, (1252), 512 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:08:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1252 transitions. [2022-03-15 22:08:49,140 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1252 transitions. Word has length 32 [2022-03-15 22:08:49,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:08:49,140 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 1252 transitions. [2022-03-15 22:08:49,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:08:49,140 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1252 transitions. [2022-03-15 22:08:49,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:08:49,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:08:49,141 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:08:49,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 22:08:49,341 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,SelfDestructingSolverStorable54 [2022-03-15 22:08:49,341 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:08:49,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:08:49,342 INFO L85 PathProgramCache]: Analyzing trace with hash -860490096, now seen corresponding path program 54 times [2022-03-15 22:08:49,342 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:08:49,342 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502180303] [2022-03-15 22:08:49,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:08:49,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:08:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:08:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:08:49,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:08:49,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502180303] [2022-03-15 22:08:49,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502180303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:08:49,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944820647] [2022-03-15 22:08:49,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:08:49,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:08:49,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:08:49,815 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) [2022-03-15 22:08:49,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 22:08:49,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-15 22:08:49,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:08:49,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 22:08:49,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:08:51,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:08:51,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 176 [2022-03-15 22:08:53,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:08:53,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:08:53,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 34 case distinctions, treesize of input 97 treesize of output 317 [2022-03-15 22:09:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:09:07,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:09:56,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:56,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:56,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:56,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:56,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:56,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:56,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:56,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:56,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:56,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:09:56,871 INFO L353 Elim1Store]: treesize reduction 40, result has 82.5 percent of original size [2022-03-15 22:09:56,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 82 treesize of output 236 [2022-03-15 22:09:56,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:09:56,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 277 treesize of output 323 [2022-03-15 22:10:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:10:14,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944820647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:10:14,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:10:14,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 51 [2022-03-15 22:10:14,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1355984786] [2022-03-15 22:10:14,325 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:10:14,327 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:10:14,337 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 60 transitions. [2022-03-15 22:10:14,337 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:10:14,621 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [59586#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:10:14,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:10:14,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:10:14,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:10:14,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=2403, Unknown=17, NotChecked=0, Total=2862 [2022-03-15 22:10:14,622 INFO L87 Difference]: Start difference. First operand 513 states and 1252 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:10:15,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:10:15,058 INFO L93 Difference]: Finished difference Result 1405 states and 3429 transitions. [2022-03-15 22:10:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:10:15,058 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 22:10:15,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:10:15,061 INFO L225 Difference]: With dead ends: 1405 [2022-03-15 22:10:15,061 INFO L226 Difference]: Without dead ends: 1382 [2022-03-15 22:10:15,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=489, Invalid=2686, Unknown=17, NotChecked=0, Total=3192 [2022-03-15 22:10:15,061 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:10:15,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:10:15,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2022-03-15 22:10:15,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 501. [2022-03-15 22:10:15,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.448) internal successors, (1224), 500 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:10:15,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1224 transitions. [2022-03-15 22:10:15,070 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1224 transitions. Word has length 32 [2022-03-15 22:10:15,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:10:15,070 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1224 transitions. [2022-03-15 22:10:15,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:10:15,070 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1224 transitions. [2022-03-15 22:10:15,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:10:15,071 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:10:15,071 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:10:15,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 22:10:15,271 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,SelfDestructingSolverStorable55 [2022-03-15 22:10:15,272 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:10:15,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:10:15,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1135766752, now seen corresponding path program 55 times [2022-03-15 22:10:15,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:10:15,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371373622] [2022-03-15 22:10:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:10:15,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:10:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:10:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:10:15,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:10:15,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371373622] [2022-03-15 22:10:15,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371373622] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:10:15,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159600140] [2022-03-15 22:10:15,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:10:15,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:10:15,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:10:15,719 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) [2022-03-15 22:10:15,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 22:10:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:10:15,751 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:10:15,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:10:16,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:10:16,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 178 [2022-03-15 22:10:17,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:10:17,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:10:17,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:17,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 22 [2022-03-15 22:10:17,464 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:10:17,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:10:20,445 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:10:20,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 118 treesize of output 404 [2022-03-15 22:10:20,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:10:20,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 397 treesize of output 433 [2022-03-15 22:10:42,508 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:10:42,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159600140] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:10:42,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:10:42,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-15 22:10:42,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [192360873] [2022-03-15 22:10:42,509 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:10:42,511 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:10:42,522 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 68 transitions. [2022-03-15 22:10:42,522 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:10:42,931 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [62233#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue (+ 3 start)) (select queue (+ 2 start))) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:10:42,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:10:42,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:10:42,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:10:42,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1910, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 22:10:42,932 INFO L87 Difference]: Start difference. First operand 501 states and 1224 transitions. Second operand has 21 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:10:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:10:43,352 INFO L93 Difference]: Finished difference Result 1351 states and 3301 transitions. [2022-03-15 22:10:43,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:10:43,352 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 22:10:43,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:10:43,354 INFO L225 Difference]: With dead ends: 1351 [2022-03-15 22:10:43,354 INFO L226 Difference]: Without dead ends: 1324 [2022-03-15 22:10:43,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=383, Invalid=2167, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:10:43,355 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:10:43,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:10:43,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-03-15 22:10:43,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 495. [2022-03-15 22:10:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 2.4493927125506074) internal successors, (1210), 494 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:10:43,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1210 transitions. [2022-03-15 22:10:43,363 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1210 transitions. Word has length 32 [2022-03-15 22:10:43,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:10:43,364 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1210 transitions. [2022-03-15 22:10:43,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:10:43,364 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1210 transitions. [2022-03-15 22:10:43,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:10:43,364 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:10:43,364 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:10:43,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-15 22:10:43,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:10:43,565 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:10:43,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:10:43,565 INFO L85 PathProgramCache]: Analyzing trace with hash -311783632, now seen corresponding path program 56 times [2022-03-15 22:10:43,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:10:43,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978952279] [2022-03-15 22:10:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:10:43,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:10:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:10:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:10:44,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:10:44,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978952279] [2022-03-15 22:10:44,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978952279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:10:44,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507136366] [2022-03-15 22:10:44,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:10:44,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:10:44,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:10:44,025 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) [2022-03-15 22:10:44,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 22:10:44,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:10:44,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:10:44,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 22:10:44,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:10:46,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:10:46,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 176 [2022-03-15 22:10:58,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:58,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:10:58,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:58,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:58,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:58,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:58,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:58,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:58,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:58,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:58,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:58,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:10:58,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 62 treesize of output 138 [2022-03-15 22:11:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:11:01,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-03-15 22:11:14,370 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 22:11:14,379 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 [2022-03-15 22:11:14,571 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 22:11:14,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-15 22:11:14,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:11:14,771 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 6,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 50 known predicates. [2022-03-15 22:11:14,773 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 22:11:14,773 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 22:11:14,774 INFO L732 BasicCegarLoop]: Path program histogram: [56, 1, 1] [2022-03-15 22:11:14,775 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 22:11:14,776 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 22:11:14,777 INFO L202 PluginConnector]: Adding new model dec-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 10:11:14 BasicIcfg [2022-03-15 22:11:14,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 22:11:14,777 INFO L158 Benchmark]: Toolchain (without parser) took 800077.46ms. Allocated memory was 208.7MB in the beginning and 319.8MB in the end (delta: 111.1MB). Free memory was 173.1MB in the beginning and 119.5MB in the end (delta: 53.7MB). Peak memory consumption was 165.4MB. Max. memory is 8.0GB. [2022-03-15 22:11:14,777 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 208.7MB. Free memory is still 174.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 22:11:14,777 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.65ms. Allocated memory is still 208.7MB. Free memory was 173.1MB in the beginning and 171.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 22:11:14,777 INFO L158 Benchmark]: Boogie Preprocessor took 13.41ms. Allocated memory is still 208.7MB. Free memory was 171.6MB in the beginning and 170.6MB in the end (delta: 992.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 22:11:14,777 INFO L158 Benchmark]: RCFGBuilder took 164.08ms. Allocated memory is still 208.7MB. Free memory was 170.6MB in the beginning and 161.2MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 22:11:14,777 INFO L158 Benchmark]: TraceAbstraction took 799868.78ms. Allocated memory was 208.7MB in the beginning and 319.8MB in the end (delta: 111.1MB). Free memory was 160.6MB in the beginning and 119.5MB in the end (delta: 41.2MB). Peak memory consumption was 153.9MB. Max. memory is 8.0GB. [2022-03-15 22:11:14,777 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 208.7MB. Free memory is still 174.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.65ms. Allocated memory is still 208.7MB. Free memory was 173.1MB in the beginning and 171.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 13.41ms. Allocated memory is still 208.7MB. Free memory was 171.6MB in the beginning and 170.6MB in the end (delta: 992.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 164.08ms. Allocated memory is still 208.7MB. Free memory was 170.6MB in the beginning and 161.2MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 799868.78ms. Allocated memory was 208.7MB in the beginning and 319.8MB in the end (delta: 111.1MB). Free memory was 160.6MB in the beginning and 119.5MB in the end (delta: 41.2MB). Peak memory consumption was 153.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.4s, 32 PlacesBefore, 20 PlacesAfterwards, 28 TransitionsBefore, 16 TransitionsAfterwards, 124 CoEnabledTransitionPairs, 2 FixpointIterations, 6 TrivialSequentialCompositions, 7 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 0 ChoiceCompositions, 15 TotalNumberOfCompositions, 144 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 121, positive: 110, positive conditional: 0, positive unconditional: 110, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 74, positive: 66, positive conditional: 0, positive unconditional: 66, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 121, positive: 44, positive conditional: 0, positive unconditional: 44, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 74, unknown conditional: 0, unknown unconditional: 74] , Statistics on independence cache: Total cache size (in pairs): 13, Positive cache size: 9, Positive conditional cache size: 0, Positive unconditional cache size: 9, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4 - 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: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 6,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 50 known predicates. - TimeoutResultAtElement [Line: 57]: 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 33 with TraceHistMax 6,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 50 known predicates. - TimeoutResultAtElement [Line: 57]: 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 33 with TraceHistMax 6,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 50 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 799.8s, OverallIterations: 58, TraceHistogramMax: 6, PathProgramHistogramMax: 56, EmptinessCheckTime: 0.0s, AutomataDifference: 13.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.5s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3484 SdHoareTripleChecker+Valid, 10.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3484 mSDsluCounter, 51 SdHoareTripleChecker+Invalid, 8.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6289 mSDsCounter, 1301 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20269 IncrementalHoareTripleChecker+Invalid, 21570 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1301 mSolverCounterUnsat, 1 mSDtfsCounter, 20269 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3846 GetRequests, 1981 SyntacticMatches, 96 SemanticMatches, 1769 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 21099 ImplicationChecksByTransitivity, 205.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=515occurred in iteration=52, InterpolantAutomatonStates: 810, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 57 MinimizatonAttempts, 12698 StatesRemovedByMinimization, 57 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 730.2s InterpolantComputationTime, 2676 NumberOfCodeBlocks, 2676 NumberOfCodeBlocksAsserted, 244 NumberOfCheckSat, 3820 ConstructedInterpolants, 1136 QuantifiedInterpolants, 113365 SizeOfPredicates, 941 NumberOfNonLiveVariables, 5684 ConjunctsInSsa, 2431 ConjunctsInUnsatCore, 164 InterpolantComputations, 4 PerfectInterpolantSequences, 738/6034 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